Which one is not true about counter trade?

Which one is not true about counter trade?

A.Counter trade is implemented because it helps a country to deal with foreign exchange shortages.

B.Counter trade can be used to promote exports.

C.Counter trade can be used to reduce uncertainty regarding export receipts.

D.Counter trade is used to bypass a demestic price agreement like, for example，that of OPEC.

正确答案是D