Question

the wto was created
to end tariffs on goods traded with canada
to end tariffs on goods traded with mexico
to unify the currencies of european countries
to help international trade run smoothly

Explanation:

The World Trade Organization (WTO) aims to facilitate international trade. Ending tariffs with specific countries (Canada, Mexico) is too narrow. Unifying European currencies is the role of the Eurozone. The WTO's core purpose is to ensure smooth international trade.

Answer:

to help international trade run smoothly