Answer:
B. unconditioned response (UCR)
Explanation:
Unconditioned response: In psychology, the term unconditioned response is a part of the classical conditioning theory which was proposed by Ivan Pavlov. The unconditioned response is defined as an unconnected or unlearned response that generally arises naturally concerning the unconditioned stimulus.
The unconditioned response is also denoted as UCR and is considered as behavior that arises as a result of specific stimuli.
In the question above, the statement signifies the unconditioned response.