After Mexico, Canada, and the United States signed the North American Free Trade Agreement (NAFTA), trade among these three countries
A. increased significantly
B. remained unaffected.
C. became less competitive.
D. dropped to a record low.

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answer: the risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation:

the answer is a) high entry costs