copy what the other students are doing. ask the teacher to first demonstrate the entire experiment. perform the experiment after memorizing the instructions. read and understand all directions before starting the experiment.
I gave my students this multiple choice question: In order for students to perform lab experiments safely and accurately, they should

Only one answer is correct among these 4 choices:
- copy what the other students are doing.
- ask the teacher to first demonstrate the entire experiment.
- perform the experiment after memorizing the instructions.
- read and understand all directions before starting the experiment.

Could you tell me which one is correct?

read and understand all directions before starting the experiment.