please help with the second one. list some examples of the us becoming more active in world affairs during the 1850s.

By the 1850s the United States had become a nation polarized by specific regional identities. The South held a pro-slavery identity that supported the expansion of slavery into western territories, while the North largely held abolitionist sentiments and opposed the institution's westward expansion.

Explanation:

the answer. is b

hope this : d

federal power is further limited with a system of checks and balances that gives each branch of government a measure of power over the others.

explanation: