14 pts IV. (3) A. What has been the single most significant contribution, in terms of a change in global trade policy, of the WTO to liberalizing international trade over the past 60 years (moving the world toward freer trade)? (9) B. Briefly, describe the workings of the dispute settlement mechanism(DSM) of the WTO. Then proceed to identify the 3 possible outcomes when the WTO rules in favor of the complainant nation. Finally, what country has been the main target of US complaints (at the WTO DSM)? (2) C. Comment on the claim that "the US loses almost all cases (complaints) filed at the WTO.&quot