The Girl Across the Street Loves to Play Basketball in Her

The girl across the street loves to play basketball in her driveway, and you see her out shooting hoops almost every day (she's really good at it, too!) . But lately you notice that she hasn't been out at all. Talking to a neighbor one day, you learn that the girl's father wanted her to play basketball someday at the collegiate level, and so he began paying her $5.00 an hour for her basketball playing. The father thought that this would give the girl some incentive to practice and get really good at the game, but instead she lost interest in basketball entirely. It is obvious that

A) extrinsic rewards undermined spontaneous interest.
B) intrinsic rewards undermined spontaneous interest.
C) the little girl's choices reflect a growing maturity.
D) the little girl was intrinsically motivated to stop playing basketball.