Which of the Following Is NOT an Accurate Statement Concerning

Which of the following is NOT an accurate statement concerning the consequences of the Mexican War?

A) Mexico ceded California and the interior southwest to the United States.
B) The acquisition of new territories pushed the slavery issue to the forefront of national politics.
C) The war temporarily unified the country as both parties and all sections supported President Polk and approved the war effort.
D) A proposal was introduced in Congress to ban slavery in any new territory; and though it never passed, the idea became central to the antislavery movement in the 1850s.