Normally Chet Doesn't Stop When He Encounters a Flyer in the Parking

Multiple Choice

Normally Chet doesn't stop when he encounters a flyer in the parking lot, but today he notices that his professor is coming his way and seems to be picking up the discarded flyers. Chet begins to pick up the flyers and shouts out a greeting to his professor. Chet is probably motivated by

A) reduction of aversive arousal.
B) fear of punishment for not helping.
C) desire for reward.
D) increase in social status.