Which one is not true about coun

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】：D
【题目解析】：several presumed advantages in counter trade ：
（1）Counter trade is implemented because it helps a country to deal with foreign exchange shortages.
（2）Counter trade can be used to promote exports.
（3）Counter trade can be used to reduce uncertainty regarding export receipts.
（4）Counter trade is used to bypass an international price agreement like, for example，that of OPEC.
（5） Counter trade may help those nations, with serious debt problems to continue to import goods while, in effect, concealing export earnings from creditors.参见教材P127。