<span>because most formerly enslaved workers left the South. (fun fact) the south lost a lot of money in their plantations etc because of the release of the slaves. hints why they fought against it. it was their lively hood not that is was ok.</span>
I am pretty sure that the answer is A.
<span>promoting human rights is less important to American foreign policy than security concerns and economic interests.</span>
It further escalate and deepen the mood of the red scare because the people underestimated the Russians capacity and when the Russians was able to build an atomic bomb it scares a lot of the people and the spies that was caught instigated the scare more and more.
It encouraged the Industrial Revolution by allowing businesses to work for profit with minimal regulation beyond what is necessary to protect the public interest, caused Entrepreneurs to thrive and compete among each other.