to prevent spills of chemicals to prevent injury to toes or feet to keep them from getting tired feet to keep them grounded in case of shock
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The day before the class is going to do a lab experiment, their teacher reminds them not to wear open shoes to school the next day. Which rationale best explains their teacher's request?
Possibilities:
- to prevent spills of chemicals
- to prevent injury to toes or feet
- to keep them from getting tired feet
- to keep them grounded in case of shock

to prevent injury to toes or feet