Dr Reddick Is Lecturing on Various Statistical Analyses in Class

Dr. Reddick is lecturing on various statistical analyses in class. He notes the definition for post-hoc analyses as:

A) statistical tests in which both variables are categorical and determine if the distribution of participants across categories is different than expected.
B) statistical tests that examine all of the possible combinations of conditions in a way that statistically accounts for the fact that we did not predict them ahead of time.
C) statistical tests that determine whether responses from the different conditions are essentially the same or whether the responses from at least one of the conditions differ from the others.
D) statistical tests that allow a priori decisions to test comparisons between groups predicted ahead of time.