Answer:
The act intensified the issue over slavery in the United States Congress.
Explanation:
The Kansas-Nebraska Act of 1854 allowing settlers of a region to decide whether slavery to be approved within a new state's borders, and allowed for popular sovereignty. It also led to a violent rebellion called Bleeding Kansas. It was a rebel between antislavery and proslavery activists who flooded into the territories.
I would honestly say B.
sorry if I’m wrong !
Answer:1800–1842. 1821: Spain cedes Florida to United States (Adams–Onís Treaty).