is an agreement signed in 1992 and put into effect in 1994 was created to reduce tariffs between the united states

North American Free Trade Agreement (NAFTA),

Explanation:

North American Free Trade Agreement (NAFTA), controversial trade pact signed in 1992 that gradually eliminated most tariffs and other trade barriers on products and services passing between the United States, Canada, and Mexico

The agreement came into force on January 1, 1994, and superseded the 1988 Canada United States Free Trade Agreement between the United States and Canada. The NAFTA trade bloc is one of the largest trade blocs in the world by gross domestic product.

The answer is North American Free Trade Agreement(NAFTA) but the full question is " is an agreement signed in 1992 and put into effect in 1994 was created to reduce tariffs between the united states, Mexico and Canada."

Explanation:

NAFTA is the agreement signed on January 1 1992 but which came into effect  from January 1, 1994. It provided for the elimination or reduction of trade barriers between the USA, Canada and Mexico. Each of the country submitted the agreement for endorsement to their respective capital by end of 1992 but it was approved by all three countries in 1993 after it was deliberated and agreed upon with the inclusion of two side agreements, i.e North American Agreement on Labor Cooperation (NAALC) and North American Agreements on Environmental Cooperation (NAAEC)

c is the correct answer for this question.

the tallest building in the western hemisphere and the sixth tallest building in the world