A Company Builds Homes and Enters into a Contract with B

A Company builds homes and enters into a contract with B wherein the contract expressly provides that A Company may employ subcontractors to do some or all of the work.In this case,

A) B cannot object to the subcontractors doing the work.
B) A Company can do the work.
C) both A Company and the subcontractors can do the work.
D) B cannot object to A Company doing the work.
E) all of the above