USMCA is multiple choice 4 a trade bloc made up of the United States, Canada, and Mexico whose purpose is to reduce tariffs and other trade barriers among the three countries. a common currency zone in which members have adopted the euro as their common currency. a trading bloc of 27 (not 28) European countries who have agreed to abolish tariffs and import quotas on most products and have liberalized the movement of labor and capital. a group that oversees trade agreements reached by member nations and arbitrates trade disputes among them