18. The creation of a quota on Canadian softwood lumber sold in the U.S. may affect prices and quantities of Canadian softwood lumber sold in the U.S. and the prices and quantities of U.S. softwood lumber sold in the U.S. Assuming that the quota is set at a level lower than the current level of imports, the resulting equilibrium price paid by consumers in the imported Canadian softwood lumber market will ______________.
a. Rise
b. Fall
c. Not change
d. May rise or fall