Floriano Is Walking Back to His Apartment Late at Night

Floriano is walking back to his apartment late at night alone after going to watch three horror movies.When an alley cat knocks over some trashcans,he shouts aloud in fear and begins to run.Floriano's reaction to the cat is likely the result of

A) sensitization.
B) habituation.
C) classical conditioning.
D) operant conditioning.