The classroom would be fairly cold. The classroom would have poor lighting. The classroom would have good ventilation. The classroom would have carpet on the floors.
I gave my students this multiple choice question: If a classroom experiment involves the use of several unidentified chemical solutions, which factor would be most important in maintaining safety during the experiment?

Only one answer is correct among these 4 choices:
- The classroom would be fairly cold.
- The classroom would have poor lighting.
- The classroom would have good ventilation.
- The classroom would have carpet on the floors.

Could you tell me which one is correct?

The classroom would have good ventilation.