Justin Contracted with Kevin to Serve as a Guide for Kevin

Justin contracted with Kevin to serve as a guide for Kevin on his three-day rafting trip to Colorado.The contract was made on April 15 with the trip to begin on June 15.On May 15,Kevin notified Justin that he had changed his mind and would not be taking the trip.He also refused to pay Justin any compensation.In this case:

A) because the contract is executory,Justin has suffered no damages,and Kevin has no obligation to pay any compensation.
B) Kevin has anticipatorily repudiated the contract and is liable to Justin for damages.
C) Justin is discharged from his duty to serve as guide,but he must wait until after June 15 to bring suit against Kevin.
D) All of these.