PLEASE HELP!! WILL AWARD BRAINLIEST!! 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.