Marys mother agrees to give her a new car if Marymaintains an A average for her

Marys mother agrees to give her a new car if Marymaintains an A average for her senior year of college. Mary does infact earn an A average but when she asks for the car Marysmother tells Mary that she just told Mary that to motivate her andshe will not be getting a car. Mary sued her mother alleging abreach of contract. Who will win this suit?A. Mary wins but only if she can prove that the fair market valueof the time she spent studying was equal to the value of thecar.B. Marys mother wins because Mary had a preexisting obligation todo her best.C. Marys mother wins because there was no consideration for herpromise.D. Mary wins because her actions in reliance upon her motherspromise constitute consideration.