Based on What Was Presented in the Textbook, If You

Based on what was presented in the textbook, if you did a study that involved a comparison of different therapeutic techniques, you would conclude what?

A) most are ineffective compared to those who did not have therapy
B) generally, treatment is effective no matter what type of therapy you try
C) while differences exist in success rates, there is tremendous variability in the range of success rates.
D) success appears to be dependent on expectations, but only for humanistic approaches