Which country is the United States' largest trading partner in terms of volume of trade?

Part of the reason for the success of Facebook is:

A. the avoidance of a positive externality. b. a strong negative network externality. C. a strong positive network externality. D. the avoidance of a negative externality.

Which of the following statements is the MOST accurate about the Law of One Price on Scandinavian ferry lines?

A) Due to menu costs, the Law of One Price does not hold. B) To avoid arbitrage opportunities, the Law of One Price must hold. C) Transaction costs of exchanging currency causes the Law of One Price to fail. D) Transportation costs between ferry lines leads to a violation of the Law of One Price. E) The physical distance allowed the Law of One Price to hold.