wearing protective clothing and goggles keeping the window open closing the door to the hall using bright fluorescent lights
I gave my students this multiple choice question: Which is the most important safety measure to follow when using an acid in a classroom laboratory?

Only one answer is correct among these 4 choices:
- wearing protective clothing and goggles
- keeping the window open
- closing the door to the hall
- using bright fluorescent lights

Could you tell me which one is correct?

wearing protective clothing and goggles