Could anyone explain the answer to this multiple-choice question to me?

In 1995. the World Trade Organization, or WTO, was established as a formal organization - succeeding the GATT - for what official purpose: C) Providing a multilateral framework for trade liberalization negotiations (and policing them). C) Promoting total free trade across its expanding membership and enforcing the rules and norms of global free trade. C) To help promote prosperity of so-called "Blue Collar" workers in Advanced Economies. C) The purg)ose of fulfilling a not-so-secret Neoliberal agenda of allowing multinational corporations to operate with increasing freedom across national frontiers. C) To safeguard the gains from liberalized trade made between 1945-95 and entrench different countries' safeguards for workers.