【单选题】Phil enters into a contract to hire Bob's Building Business to build a warehouse for Phil. The contract specifies that the warehouse should be built with HighQual Bricks. When construction starts, Hig...
A.
discharge Phil from the contract.
B.
has no effect on the contract.
C.
increase Bob's Building Business's duties under the contract.
D.
suspends Bob's Building Business's duty to perform.