Mark Lepper and His Colleagues (1973)asked Nursery School Children to Draw

Mark Lepper and his colleagues (1973) asked nursery school children to draw pictures with magic markers,a task they already found intrinsically motivating.One group was promised a reward,a second group was not given a reward,and a third group was provided with a surprise reward.Which group was found to spend the most time drawing the next day when the children were given an opportunity to spend time on the activity of their choosing?

A) The group provided with no reward spent the most time drawing.
B) The group provided with a surprise reward spent the most time drawing.
C) The group provided with a reward spent the most time drawing.
D) The group provided with a reward and the group provided with a surprise reward spent the same amount of time drawing.