Benson, a Black Lab, Had Learned to Associate Two Stimuli

Benson, a black lab, had learned to associate two stimuli with getting taken for a walk, his owner getting out his leash, and his owner getting out a belt. Every time his owner picked up his belt, Benson would jump around and get excited. His owner wanted Benson to stop that so he repeatedly took out his belt without taking Benson for a walk, and always took him for a walk when getting out his leash. He was teaching Benson to _____

A) generalize.
B) extinguish.
C) discriminate.
D) learn preferentially.