Justin Became Fearful of Doctors and Nurses Because Doctors and Nurses

Multiple Choice

Justin became fearful of doctors and nurses because doctors and nurses were paired with painful shots.Justin's doctor has his office in a round brick building.Now any round brick building will elicit fear and crying from Justin.
Becoming fearful of round brick buildings because they were associated with his doctor is an example of

A) shaping.
B) extinction.
C) vicarious conditioning.
D) higher-order conditioning.