Which of the Following Is a Major Obstacle to the Establishment

Which of the following is a major obstacle to the establishment of the Free Trade Area of the Americas?

A) The United States wants its southern neighbors to agree to tougher enforcement of intellectual property rights, which they do not want to embrace.
B) Some constituent nations insist on a common currency, an initiative that has not found support among many nations.
C) Brazil and Argentina want the United States to open up critical industries such as telecom and airlines.
D) The major trading blocks in the region, NAFTA and Mercosur, have opposed its establishment.
E) There is no consensus on trade policies between Brazil and Argentina.