As a Child, Mary Always Had an Unpleasant Time Whenever

As a child, Mary always had an unpleasant time whenever she visited her cousins. In addition, most of the times she visited, her aunt would serve meatloaf for dinner. As an adult, Mary hates meatloaf. If her dislike of meatloaf were classically conditioned, the meatloaf would be the

A) unconditioned stimulus.
B) unconditioned response.
C) conditioned response.
D) conditioned stimulus.