ABA Designs Why Did Jones and Friman (1999) Follow Condition

Multiple Choice

ABA Designs Why did Jones and Friman (1999) follow condition B with condition BC in their A-B-BC-A-BC study of insect phobia?

A) to bolster the poor performance of the exposure hierarchy
B) to demonstrate reversal
C) to prevent confounding by the control condition
D) to prevent relapse of his math performance