Refined Mills Orders "Grade A" Oats from Sweet Valley Farms

Refined Mills orders "Grade A" oats from Sweet Valley Farms to grind and sell to Town Co-op Grocery. Sweet Valley ships "Grade B" oats, which Refined Mills accepts after a reasonable inspection believing it to be Grade A. Once Refined Mills discovers that the oats are Grade B, it

A) can revoke its acceptance .
B) can use all the grain but sue Sweet Valley for the full purchase price.
C) can cancel the contract and keep the nonconforming goods.
D) can give Sweet Valley up to sixty days to cure the defect.