The General Agreement on Tariffs and Trade,the Predecessor of the World

The General Agreement on Tariffs and Trade,the predecessor of the World Trade Organization,was ineffective regarding the resolution of trade disputes because:

A) there were no enforcement rules to penalize violators.
B) member nations that lost disputes had the power to veto the sanctions imposed regarding decisions made against them.
C) there were not enough member nations to make resolution of disputes fair.
D) without a body of international precedent, there was little to base a nation's actions on, so decision-makers were hesitant to enforce sanctions against violators, due to concerns about the assurance of fairness and justice.
E) the United States withdrew from GATT, primarily due to its controversial dispute resolution provisions.