Sinks are empty. Glassware is clean. Eye protection is worn. Electrical equipment is off.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In the lab, students are working with substances that could cause burns. Which of these safety precautions is most important to follow?
Possibilities:
- Sinks are empty.
- Glassware is clean.
- Eye protection is worn.
- Electrical equipment is off.

Eye protection is worn.