Jason's Mother Would Like Him to Go to College,so in June

Multiple Choice

Jason's mother would like him to go to college,so in June he enrolls at State University.He also quits his job and tells his mother his plans to continue taking classes.His mother says,"I'm so happy that you are going to college that I want to pay for your books." Jason then sends her a bill for $485.Which of the following is true regarding his mother's promise?

A) It is enforceable,because Jason returned to college.
B) It is enforceable,because Jason is giving up the right to do something else.
C) It is unenforceable,because it is a unilateral contract.
D) It is unenforceable,because Jason had already enrolled in school and there is no consideration.