A Chinese export company exported some boxes of apples to Japan, and the apples should be Grade Two according to the contract. When the seller made the shipment, he found some of the apples were corrupt. In order to deliver the goods in time, the seller arranged goods immediately sending other apples (Grade One, better than Grade Two) instead, and he still marked “price be still fixated on Grade two”. Which statements as following are true?
选项：

A: The seller breached the contract because he had delivered goods not conforming with the contract.
B: The seller fulfilled the contract because he delivered goods better than the level required by the contract.
C: The buyer should take over the goods even if the seller had breached the contract.
D: The buyer should accept the performance because the seller had fulfilled the contract.