Which of the Following Is an Example of Instrumental Conditioning

Multiple Choice

Which of the following is an example of instrumental conditioning?

A) A baby begins to ignore a new toy after several days.
B) You were accidentally startled when you entered a new classroom; now you hesitate as you enter that classroom.
C) Each time you reached for the potatoes rather than asking politely, your mother slapped your hand.
D) You know it will rain because you see dark clouds.