Tim Is Just Learning to Play the Piano And, Somewhat

Tim is just learning to play the piano and, somewhat surprisingly, he already enjoys playing it even though he isn't very good. Tim's parents would like to see him develop his skills so they decide to pay Tim $10.00 at the end of each week if he has satisfactorily practiced all his lessons. Motivation theorists familiar with the overjustification hypothesis would argue that the rewards being offered by Tim's parents may decrease Tim's interest in piano by _______________ motivation.

A) enhancing his instinctual
B) undermining his growth
C) enhancing his growth
D) undermining his intrinsic