Mitchell records the amount of time a toy car takes to travel down a ramp one time for each of four slope angles. His lab partner, Sarah, suggests that he run the same set of trials two more times.

What argument should Sarah use to support her suggestion?
1.More trials will prove the results.
2.More trials will reduce mistakes.
3.More trials will guarantee correct results.
4.More trials will help identify other possible problems.

NEED ANSWERS ASAP