Question

if a lab experiment is not completed, you should
discuss the issue with your instructor
sneak in after school and work alone
come in during lunch and finish while eating lunch
make up some results

Explanation:

In lab safety and procedure, incomplete experiments should be addressed properly. Sneaking in alone, working during lunch (unsafe/distracting), or making up results are unethical/unsafe. Discussing with the instructor is the correct, responsible action.

Answer:

A. discuss the issue with your instructor