<span>B. By engaging in a military buildup the Soviets couldn't hope to equal.</span>
One good organizing topic for the post–Civil War era would be "Reconstruction," since this was the stage that took place immediately after the war, in which the North tried to "Reconstruct" the South in terms of its economy and social structure.
One of the most significant changes in the South after the war was that they were no longer allowed to have slaves under legal law. However, there still were loopholes to this law (i.e.- Jim Crow Laws).
They started to create more safety precautions. Airport security has been upgraded to extremes with scanners and xrays. Border security has also been emphasized on. The US has taken countless steps, alot of which are directed towards defence
I think you forgot to add some details but based on my research, the correct answers are Rhode Island, Delaware, and Georgia. These states would probably oppose a system wherein the number of votes each state had in the nation's legislature will be based on the state's population. These states will oppose because they are less populous. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.