Which One of the Following Is the Clearest Example of a Child

Multiple Choice

Which one of the following is the clearest example of a child working for an incentive?

A) Arnold's mother gives him a dollar after he surprises her by mowing the lawn.
B) Betsy decides not to talk in class because her teacher ridiculed her earlier in the day when she gave an incorrect answer.
C) Cyril stays out late, even though he knows he will be punished when he gets home.
D) Doris is studying for a history test with the hope that she'll get an A on it.