Although the quality of these goods is（） usual standard， we are prepared to accept the goods if you will reduce the price， say， by 20%.

Although the quality of these goods is（） usual standard， we are prepared to accept the goods if you will reduce the price， say， by 20%.
A、not in line with
B、not conform to
C、not up to
D、not in conformity to
正确答案：C