Which of the Following Students Appears to Be Intrinsically Motivated

Which of the following students appears to be intrinsically motivated?

A) Marty likes to watch her cousin go parasailing,but is afraid to go up with him.After much persuasion,she agrees to try it once to please her cousin.
B) Alfonso studies for the spelling bee every night and wants to win the trophy to make his dad proud of him.
C) Shonda takes her mystery book to all of her classes and reads a few more pages whenever she gets a chance.
D) Len competes with his best friend to make the highest grade in algebra class.