After Observing the Amount of Time Elementary Students Spent Playing

After observing the amount of time elementary students spent playing new math games,David Greene,Betty Sternberg,and Mark Lepper (1976) provided rewards to children for playing with the games.After the rewards were removed,

A) children's intrinsic interest in the math games increased.
B) the time children spent playing the game remained the same.
C) although children reported less liking for the math games,they continued to play with them.
D) children's intrinsic interest in the math games decreased.