Which of the Following Best Describes When We Would Reject

Which of the following best describes when we would reject the null hypothesis when doing an ANOVA analysis?

A) If the variation of group means is less than expected based on the variation between values within each group.
B) If the variation of group means is more than expected based on the variation between values within each group.
C) If the variation of values within each group is less than expected based on the variation between values of the group means.
D) If the variation of values within each group is more than expected based on the variation between values of the group means.