:world trade organization; international organization dealing with the rules of trade between nations.

WTO

Explanation:

WTO is the acronym for World Trade Organization; international organization dealing with the rules of trade between nations.

WTO facilitates the implementation, administration, and operations of trade agreements between nations. It provides a forum for trade negotiations between its member nations.  

The role of world trade organization is to provide fair platform to its member country to aid in service like exports , imports and conduct their business in a peaceful way.

i might look it up later.

answer(b) equal; set period;