A map showing the continental United States. Areas designated on the map include the original 13 colonies, the Florida Territory, the Louisiana Purchase, the Texas Annexation, Mexico, the Mexican Cession, The Oregon Territory, the Gadsden Purchase, and the British Cession of 1818.

The map above shows the area of land known as the Mexican Cession. How did the outcome of the Mexican-American War affect trade in the United States?

a) It made trade with Asian countries easier.

b) It provided a trade route between the United States and Canada.

c) It prohibited trade between the United States and South America.

d) It had very little impact on trade, since the area gained was mountainous.

a) It made trade with Asian countries easier.