Concept:The WTO is an international body that manages global trade and promotes trade liberalisation between nations.
Explanation:The main objective of the World Trade Organisation is to make international trade flow smoothly, freely, and predictably.
It provides a permanent forum where member countries negotiate reductions in tariffs and other trade barriers.
It also sets and enforces trade rules, monitors trade policies, and resolves trade disputes among members.
Option A is wrong because protecting infant industries is not the core aim of the WTO.
Option C is wrong because assisting countries with balance of payments problems is mainly the role of the IMF.
Option D is wrong because helping developing countries execute projects is primarily associated with the World Bank.
Therefore, the option that best matches the central purpose of the WTO is tariff reduction through negotiation.
Answer:B. provide a mechanism for tariff reduction