Homeowner Enters into an Agreement with Grasscutter to Cut the Grass

Multiple Choice

Homeowner enters into an agreement with Grasscutter to cut the grass at Homeowner's house.The contract says nothing about delegation or assignment.Grasscutter gets a friend,Lawnmower to do the actual work.Which is true?

A) This is a breach of the original contract because Grasscutter was the person hired.
B) This is an assignment by Grasscutter of his duty to cut the grass.
C) Because the contract does not mention assignment or delegation,Grasscutter cannot have someone else perform his duty.
D) Grasscutter can have Lawnmower do the work,but Grasscutter can be held responsible if Lawnmower does not do the work properly.