Why was the Mexican Cession important to the United States? A. It abolished slavery in the United States. B. It gave Mexico all the land west of Texas. C. It recognized Texas as an independent nation. D. It gave the United States a large amount of land.
B : After Texas fought for freedom, Mexico began crossing the Rio Grande territory, which was then America's. So, they fought agaondt the Mexicans to get the Mexican Cession territory, therefore expelling the Mexicans from America.
