Which of the Following Applies to the Use of Extrinsic

Which of the following applies to the use of extrinsic motivation?

A) When extrinsic motivation is stressed, people are more likely to solve tricky problems and come up with innovative ideas.
B) If extrinsic rewards are used with children they should be small and phased out as soon as possible.
C) If someone has no intrinsic interest in an activity to begin with, using extrinsic rewards will not work as motivators.
D) People who are extrinsically rewarded are likely to work harder and be more creative.