Which of the following statements is true of the North American market? Select one: a. The North American Free Trade Agreement was signed by the U.S., Canada, and Costa Rica. b. The U.S. is the home country of more top global brands than any other country in the world. c. All the three countries that signed the NAFTA have adopted a common currency called the dollar. d. Canada has a purely capitalist economy but with an outdated manufacturing base and unskilled labor force