Systematic and contact desensitization evolved from:

A) classical conditioning principles.
B) modeling therapies.
C) biofeedback techniques.
D) operant conditioning principles.

Systematic Desensitization

A behavioral therapy technique used to reduce phobic reactions and anxiety through gradual exposure to the feared object or situation paired with relaxation exercises.

Classical Conditioning Principles

The key concepts of classical conditioning, including the processes of acquisition, extinction, spontaneous recovery, generalization, and discrimination.