Which of the Following Is a Major Obstacle Confronting the Establishment

Which of the following is a major obstacle confronting the establishment of the Free Trade Area of the Americas (FTAA) ?

A) United States wants its southern neighbors to agree to tougher enforcement of intellectual property rights and lower manufacturing tariffs.
B) Some constituent nations insist on a common currency,an initiative that has not found support among many nations.
C) Brazil and Argentina wants US to open up critical industries such as telecom and airlines.
D) The move has faced stiff opposition from the two major trading blocks in the region (NAFTA and Mercosur) .