The <em>Union</em> was confirmed by the most industrialized states in the country. This meant that the production of weapons and tools related to war logistics was controlled by them. Besides having more weapons and supplies, the <em>Union</em> also had more soldiers, as the population was considerably bigger in the north.
Railroads are a sign of development. In terms of war, they helped mobilize troops and resources along the country with relative ease in comparison to their <em>Confederate</em> counterparts. This represented a great advantage for the <em>Union</em>.
Besides having the previously mentioned advantages. The <em>Union</em> also had the naval power on their side and executed the blockade in an attempt to cut the resources from The <em>Confederacy</em>. As a response, the southern states replaced the growth of Cotton with other crops in order to have food supplies.
Massive retaliation, also known as a massive response or massive deterrence, is a military doctrine and nuclear strategy in which a state commits itself to retaliate in much greater force in the event of an attack.
Answer:
The answer to this question is A
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The death toll was roughly 630,000
