Explain the problems that occur when government institutes wage and price controls, and explain the rationale for these controls

Governments sometimes erect barriers to trade other than tariffs and quotas. which of the following is not an example of this type of trade barrier? a. a requirement that the employees of domestic firms that engage in foreign trade pay income taxes b. restrictions on imports for national security reasons c. a requirement that imports meet health and safety requirements d. a requirement that the u.s. government buy military uniforms only from u.s. manufacturers