The dropdown menus in my website just refuse to work and I cannot see why. I've looked through this site and others, as well as rereading the bootstrap documentation but I just have no idea why it is not working. They will not dropdown. I know that they are being clicked because the hash symbol will appear in the URL when I do click them, but no drop animation occurs.

Below is my code, with the head and navbar. 

Can anyone else see what is wrong?

```
<head>
    <title>Scott's Website</title>
    <link rel="stylesheet" type="text/css" href="styles/bootstrap/css/bootstrap.css" />
    <link rel="stylesheet" type="text/css" href="styles/style.css" />
    <script type="text/javascript" src="styles/bootstrap/css/jquery-2.1.1.min.js"></script>
    <script type="text/javascript" src="styles/bootstrap/js/bootstrap.js"></script>
</head>

<body>
    <div class="container-fluid bg-dark">
        <div class="container bg-dark">
            <div class="pl-3 pr-3 pt-3 pb-0 row bg-dark text-light">
                <div class="col-9">
                    <h1>Scott McMullan</h1>
                    <div class="row pt-0 pb-0 pl-0 pr-3 bg-dark text-light">
                        <div class="col-9">
                            <h7 class="font-weight-light">Studying full time at Griffith University.</h7>
                        </div>
                    </div>
                    <div class="row pt-0 pb-3 pl-0 pr-3 bg-dark text-light">
                        <div class="col">
                            <h7 class="font-weight-light">Working towards a bachelor of Computer Science, majoring in Data Science & Artificial Intelligence.</h7>
                        </div>
                    </div>

                    <hr/>

                    <div class="row pt-0 pb-3 pl-0 pr-3 bg-dark text-light">
                        <nav class="navbar navbar-expand-lg navbar-dark">
                            <a class="navbar-brand" href="#">
                                <img src="icon.jpg" width="30" height="30" alt="mannaz" />
                            </a>
                            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent"
                                aria-expanded="false" aria-label="Toggle navigation">
                                <span class="navbar-toggler-icon"></span>
                            </button>
                            <div class="collapse navbar-collapse" id="navbarSupportedContent">
                                <ul class="navbar-nav mr-auto">
                                    <li class="nav-item">
                                        <a class="nav-link font-weight-bold" href="index.html">Home</a>
                                    </li>
                                    <li class="nav-item dropdown">
                                        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true"
                                            aria-expanded="false">
                                            Experience
                                        </a>
                                        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                                            <a class="dropdown-item" href="#">Professional</a>
                                            <a class="dropdown-item" href="#">Academic</a>
                                            <div class="dropdown-divider"></div>
                                            <a class="dropdown-item" href="#">Academic Course Breakdown</a>
                                        </div>
                                    </li>
                                    <li class="nav-item dropdown">
                                        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true"
                                            aria-expanded="false">
                                            Projects
                                        </a>
                                        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                                            <a class="dropdown-item" href="#">Professional</a>
                                            <a class="dropdown-item" href="#">Academic</a>
                                            <a class="dropdown-item" href="#">Personal</a>
                                        </div>
                                    </li>
                                    <li class="nav-item">
                                        <a class="nav-link" href="contact.html">Contact</a>
                                    </li>
                                </ul>
                            </div>
                        </nav>
                    </div>

```