Optimal currency areas should have ________ in order to succeed

Assume the United States can use a given amount of its resources to produce either 20 airplanes or 8 automobiles and Japan can employ the same amount of its resources to produce either 20 airplanes or 10 automobiles. The U.S. should specialize in:

a. neither good. b. automobiles. c. airplanes. d. both goods.

The rules of accounting generally require that ________ be included in a firm's financial records

A) only implicit costs B) only explicit costs C) both explicit costs and implicit costs D) neither explicit costs nor implicit costs