When the null hypothesis is rejected, the results of the analysis may be described as ______.

A) "insignificant"
B) "nonsignificant"
C) "significant"
D) "highly significant"

When the null hypothesis is rejected, the results are considered significant, indicating that the observed effect is unlikely to have occurred by chance alone. A and B both refer to situations where the null hypothesis is not rejected, indicating that there is not enough evidence to support a difference between groups. D is an overly enthusiastic description of the results and is not typically used in scientific reporting.