Mandy, Who Is Five, Recently Spotted a Bee Buzzing in Circles

Multiple Choice

Mandy, who is five, recently spotted a bee buzzing in circles on the sidewalk. She bent over and picked up the insect and it stung her. Now whenever Mandy hears an insect buzz, even a housefly buzzing against a screen, her heart rate increases. Mandy's fear of houseflies is __________

A) an example of extinction.
B) an example of spontaneous recovery.
C) an example of generalization.
D) an example of a conditioned response.