If the Differences Between Group Means Are Large Enough, Then

If the differences between group means are large enough, then:

A) It is likely that the assumption of sphericity will have been violated.
B) The assumption of homogeneity of variances is likely to have been violated.
C) The resulting model will be a better fit of the data than the grand mean.
D) The resulting model will be a poorer fit of the data than the grand mean.