Cory Believes That He and Dian Agreed That He Would

Cory believes that he and Dian agreed that he would act as her personal sports trainer for seven workout sessions.In a later dispute,the existence of any contract can be judged by

A) the parties' statements at the time of their alleged contract.
B) what the defendant claims was the parties' intent.
C) what the plaintiff claims was the parties' intent.
D) what the parties agree they intended.