Why might a scientist repeat an experiment if he/she didn't make a mistake in the first one? An experiment should be repeated to

A) increase income for increased work.

B) prove how good of a scientist you are.

C) double check your results.

D) show how smart you are.

Experiments are often replicated or repeated even when no obvious mistake was visible. This is to establish how variable results are. Statistically, multiple runs are used to determine the variance or standard deviation around the average value. The best answer for this is choice C, to double check results.