Arnelle noticed that whenever she opened the door to the pantry, her dog would come into the kitchen and act hungry, by drooling and whining. She thought that because the dog food was stored in the pantry, the sound of the door had become a(n) .

a. unconditioned stimulus.
b. conditioned stimulus.
c. unconditioned response.
d. conditioned response.
e. neutral stimulus.

b. conditioned stimulus

Explanation:

Conditioned stimulus is a previously neutral stimulus that, when associated with the unconditioned stimulus cause a trigger of a conditioned response. The conditioned stimulus acts a trigger to a conditioned response anytime it is paired or associated with a unconditioned stimulus.  An example is a hotel concierge begins to respond every time he hears the ringing of a bell, this is because the bell has become associated with customers needing assistance, the bell has become a conditioned stimulus.

c: in the east might be the correct answer