​ in a Written Contract, Sheldon Agreed to Tutor the Children

Multiple Choice

​ In a written contract, Sheldon agreed to tutor the children of Mrs. Smith for a certain period of time. However, Sheldon, prior to starting classes, announced that he would not be able to tutor the children due to other commitments of his. In this case, there has been a(n) :

A) anticipatory breach.
B) rescission.
C) negligent breach.
D) malpractice.