How Did the Mexican-American War Ultimately Deepen Sectional Divisions in the United

How did the Mexican-American War ultimately deepen sectional divisions in the United States?

A) All the territories acquired were immediately opened to slavery.
B) Slavery was prohibited in all the territories acquired.
C) Slaves who fought in the war began rebelling for their freedom in the South.
D) The newly acquired territories fueled a violent debate over the extension of slavery into them.
E) Southern states refused to recognize the Treaty of Guadalupe Hidalgo.