using caution when handling hot glassware turning off burners when you are not using them studying lab procedures prior to conducting the experiment checking with your teacher on the procedure to dispose of chemicals
I gave my students this multiple choice question: What is the best practice to follow when completing an experiment?

Only one answer is correct among these 4 choices:
- using caution when handling hot glassware
- turning off burners when you are not using them
- studying lab procedures prior to conducting the experiment
- checking with your teacher on the procedure to dispose of chemicals

Could you tell me which one is correct?

checking with your teacher on the procedure to dispose of chemicals