The answer to this would be:
D, A student writes an essay to receive prize money.
Here’s why.
The basic definition of intrinsic motivation is doing an activity for satisfaction, rather than some separable consequence.
Adding onto the definition, a person who is intrinsically motivated would act for the fun or for a challenge. And would do this for their own sake for rewards.
Meaning, they would care about their own personal awards, such as winning prize money for writing an essay.
Concluding my reasoning, the answer once more would be D. If this answer is wrong, then the answer for your question would be A.
(I’m fairly certain I’m not wrong though)
Hope this helps you out :)))