In a Study of Conditioned Feeding Responses When a Child

In a study of conditioned feeding responses when a child starts to suck at the sound of a bell after it is paired with a glass of milk, milk in the mouth is a(n) ____________, the bell is a(n) ____________, and the sucking in response to the bell is a(n) ____________.

A) conditional response; unconditional stimulus; conditional stimulus
B) unconditional stimulus; conditional stimulus; conditional response
C) conditional stimulus; unconditional stimulus; unconditional response
D) unconditional stimulus; conditional stimulus; unconditional response