Answer:
The escalating controversy over the expansion of slavery into the territory acquired from Mexico
Explanation:
The escalating controversy over the expansion of slavery into the territory acquired from Mexico prompted South Carolina's secession crisis of 1850 - 51. The Compromise of 1850 and the lack of broad-based support for secession in the South ended this crisis, but secessionists awaited their next opportunity.
American settlers and American Indians often clashed as settlement spread across the West during that era
Here's my answers! Sorry that I'm a bit late!! I got a C+ on my test but it said this was right so yea
B. It is B because A growing fear of immigrants and Catholics
