If a Two-Way Independent Groups ANOVA has a significant interaction, we know ______________. We do not yet know ______________.

a) there is at least one difference among the groups; where the difference(s) are and how large they are

b) there is at least one difference among the groups; where those difference(s) are

c) there are multiple difference among the groups; where those differences are and how large they are

d) there are multiple difference among the groups; how large those differences are