World trade has grown substantially in the last 60 years. For example, while world output grew at an annual rate of 3.8% per year between 1950 and 2003, world exports grew at 10.8% per year over the same time period. Which of the following help o explain the increase in international trade and finance since the 1950's?
a. International trade agreements such as the North American Free Trade Agreement (NAFTA)
b. An increasing number of affordable international flights
c. Changes in property rights
d. The widespread use of the Internet to conduct business.

The correct answer is the option A: International trade agreements such as the North American Free Trade Agreement (NAFTA).

Explanation:

To begin with, the name of "North American Free Trade Agreement" or NAFTA, refers to the comercial agreement between the three nations of the countries of the norht of America that established that there is a bloc of free trade among Canada, Mexico and the United States that will benefit the three parties whose bloc have formed one of the largest trade blocs in the world by gross domestic product. Moreover, the agreement came into force in 1994 and since then the main purpose of it is to encourage the increase and development of international trade.

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