When Marianela was a young child and watching TV with her mother, a mouse ran by. Her mother screamed, scaring her. Ever since then, Marianela has been afraid of mice. In this example, the mouse is the:

a. conditioned response

b. unconditioned response

c. conditioned stimulus

d. unconditioned stimulus

d. unconditioned stimulus

Explanation:

In psychology, the unconditioned stimulus is considered as one of the most significant factors in the classical conditioning theory which was proposed by Ivan Pavlov during his experimentation with dogs. The unconditioned stimulus is determined as a stimulus that tends to explicit or triggers a specific response automatically, unconditionally, and naturally.

According to the question above, the mouse is the 'unconditioned stimulus'.