for more accurate results for more student participation to help simplify the procedure to help explain the hypothesis
I gave my students this multiple choice question: A science class investigated the percentage of corn kernels that pop in bags of different brands of popcorn. Fifteen students tested three brands of popcorn each and reported their results to the class. Why did the teacher most likely have so many students report the results?

Only one answer is correct among these 4 choices:
- for more accurate results
- for more student participation
- to help simplify the procedure
- to help explain the hypothesis

Could you tell me which one is correct?

for more accurate results