问题如下图：
选项：
A. 
B. 
C. 
解释：
common economic 表述准不准确？和common market 容易混淆！
NO.PZ2016010801000122问题如下The fferenbetween economic union ancommon market is that:A.There is no barriers to labor movement among members in economic union.B.Common economic poliis establisheamong members in economic union.C.In economic union, members use the same currency.B is correct. Apart from aantages in common market, economic union further establishes common economic poliamong members. Monetary union apt the single currency.考点Trang Blocs, Common Markets anEconomic Unions解析经济联盟除了在共同市场上具有优势外，还进一步在成员之间建立共同的经济政策。B正确。注意到是货币联盟而不是经济联盟采用单一货币。1.采用同一种货币的组织叫currenunion ，currenunion 是一个单独的概念吗？还是包含于economic union （一个子集）？2.如果currenunion 属于economic union ，那么不选C的原因是否因为采用同一种货币的组织一定属于economic union，但是economic union不一定属于currenunion?（可能是因为除货币以外的其他经济政策统一而成为economic union）
NO.PZ2016010801000122 economy union 和 common market 还有跟其他联盟的区别是否能帮忙梳理一下谢谢，
NO.PZ2016010801000122 Common economic poliis establisheamong members in economic union. In economic union, members use the same currency. B is correct. Apart from aantages in common market, economic union further establishes common economic poliamong members. Monetary union apt the single currency. 考点Trang Blocs, Common Markets anEconomic Unions 解析经济联盟除了在共同市场上具有优势外，还进一步在成员之间建立共同的经济政策。B正确。 注意到是货币联盟而不是经济联盟采用单一货币。可以教个简单清晰的记忆方法吗
a哪里不对呢？economic union 包含common market，所以a应该也对呀
