PLEASE!!
Which of the following best summarizes an impact of the Mexican-American War?
A) Congress agreed to admit Missouri as a slaveholding state and Maine as a free state.
B) The U.S. wanted to sell the territory gained to build railroads, and the Missouri Compromise prevented it.
C) Congress decided that the people should be able to decide whether the territory gained should be allowed to have slavery.
D) The territory gained was mainly below the Missouri border, and northern leaders feared a loss of control in Congress.