to form a good hypothesis to increase the accuracy of the results to make the results more significant to better explain the investigation to others
I gave my students this multiple choice question: A student performs a lab investigation by measuring the average time it takes for a toy car to travel 10 meters. Why is it best to perform the experiment in three trials?

Only one answer is correct among these 4 choices:
- to form a good hypothesis
- to increase the accuracy of the results
- to make the results more significant
- to better explain the investigation to others

Could you tell me which one is correct?

to increase the accuracy of the results