While Behavioral Therapies Are Most Fundamentally Based on Learning Theory,it

While behavioral therapies are most fundamentally based on learning theory,it can be said that:

A) Hull's theory is the most widely accepted conceptual foundation.
B) there has never been agreement on which learning theory is at the core of the field.
C) B.F.Skinner's learning theory has by far spawned the largest number of behavioral techniques.
D) Wolpe's approach follows most directly from Mowrer's model of learning.