What point on the graph represents maximum consumer confidence?

Which of the following would increase GNP in the United States?

A) an increase in the production of Japanese-owned Toyota cars in the U.S. B) an increase in the production of Japanese-owned Toyota cars in Mexico C) an increase in the production of Mexican-owned Grupo Minsa corn in the U.S. D) an increase in the production of U.S.-owned General Motors cars made in Mexico

From the standpoint of economic efficiency, competitive markets provide:

a. less of a public good than would be efficient. b. more of a public good than would be efficient. c. exactly the amount of a public good that is efficient. d. none of these.