33. lf U.S. workers' productivities are higher than Mexican workers' productivities in all goods,

a. the U.S. has absolute advantage over Mexico in all goods. The U.S. would not gain anything from trading with Mexico.

b. the U.S. has comparative advantage in all goods. The U.S. would not gain anything from trading with Mexico.

c. the U.S. has absolute advantage over Mexico only in some goods. The U.S. should export these goods, and import others.

d. the U.S. has comparative advantage over Mexico only in some goods. The U.S. should export these goods, and import others.