Audie used to love to paint. Audie's aunt told Audie that she would give her $10 for every painting that Audie completed during the summer vacation. The next summer, Audie's aunt said she could not afford to pay Audie for her paintings. Audie was disappointed, but also relieved, because she did not enjoy painting as much anymore. Audie's change in attitude toward painting
A-may be due to the fact that her aunt paid her for number of paintings rather than for quality of paintings.
B- was because Audie was rewarded for competence rather than time on task.
C- Audie's aunt provided her with an intrinsic reward.
D- Money is not an effective motivator.