wear an acid-resistant apron wash your hands tie back long hair use an electric fan to blow gases from the flame
I gave my students this multiple choice question: Which method is the best safety procedure when working around open flames?

Only one answer is correct among these 4 choices:
- wear an acid-resistant apron
- wash your hands
- tie back long hair
- use an electric fan to blow gases from the flame

Could you tell me which one is correct?

tie back long hair