Sinks are empty. Glassware is clean. Eye protection is worn. Electrical equipment is off.
I gave my students this multiple choice question: In the lab, students are working with substances that could cause burns. Which of these safety precautions is most important to follow?

Only one answer is correct among these 4 choices:
- Sinks are empty.
- Glassware is clean.
- Eye protection is worn.
- Electrical equipment is off.

Could you tell me which one is correct?

Eye protection is worn.