Which scenario is an example of extrinsic motivation?

A. The doorbell rang, but Manny didn’t answer; he felt too exhausted for visitors.
B. When the temperature suddenly dropped, Lacey ran into a heated shop to warm up.
C. After she cheated on the exam, Crystal’s guilt finally drove her to confess to her teacher.
D. Kenji’s love of animals led him to volunteer at the wildlife rescue organization every weekend.