The correct answers are A) territory gained from Mexico in 1848. C) the Louisiana Purchase. D) the Wilmot Proviso.
The territories that were acquired by the United States that helped bring about the need for compromises dealing with slavery were the territory gained from Mexico in 1848, the Louisiana Purchase, and the Wilmot Proviso.
The Louisiana Purchase was bought from France in 1803 and gave the United States 828,00 square miles of new land. The US government agreed to pay $11,250,000 to the government of France.
Regarding the Wilmot Proviso, after the territory gained by the United States once it won the Mexican-American War, the Wilmot Proviso was designed to prohibit slavery in those new territories.