In England it is not considered acceptable to force food or drink ______ a guest so the host never gives him anything ________ firstchecking whether he wants it.

In England, it is not considered acceptable to force food or drink ______ a guest, so the host never gives him anything ________ firstchecking whether he wants it.

A. upon…without

B. to…for

C. for…with

D. at…by

请帮忙给出正确答案和分析，谢谢！