_______ the exporter's products will ultimately be bought by many individual customers,these people are _______ his direct customers who buy the products _______ him and pay for them.

_______ the exporter's products will ultimately be bought by many individual customers,these people are _______ his direct customers who buy the products _______ him and pay for them.

A.Although, rarely, from

B.Because, always, with

C.As. often. for

D.While. hardly.on

正确答案是A