Which of the Following Is a Criticism That Economists Have

Which of the following is a criticism that economists have against regional free trade areas?

A) Regional trade areas promote trade within the trade area, but they do little to promote trade across the globe.
B) Regional trade areas have been more successful in promoting worldwide trade than the WTO.
C) Some countries have abandoned the WTO to join the regional trade areas.
D) Regional trade areas require that member countries first withdraw membership from the WTO.