Which of the Following Best Illustrates Classical Conditioning

Multiple Choice

Which of the following best illustrates classical conditioning?

A) After watching another three-year-old stick out her tongue at the daycare worker, Beth does the same thing.
B) Jenny studied hard to achieve a high grade point average.
C) Because his older brother once locked him in the closet, Allen gets anxious in small, enclosed rooms.
D) Susan gives her daughter five dollars a week to help with chores around the house.