Of the Options Presented, What Is the Most Effective Way

Multiple Choice

Of the options presented, what is the most effective way to form a second-order CR?

A) Reverse the order of the CS and US presentation sequence.
B) Extinguish the CR to the original CS, then condition a new CS to the original US.
C) Pair a new CS with the original CS.
D) Habituate responses to both the first and the second CS, then pair the two as a compound CS.