The chief reason for the purchase of Alaska was A. The established seal fishery industry in the territory promised economic benefits.
No
Why: in the case of an a real build up of supporters for a nazi like movement in the United States would be crazy. Imagine how many regions and people suffered such as Jehovah’s Witness and Jews affected to the sum of almost 5-6 million deaths. If the USA learned from are history most likely this would not happen I rest my case XD
Basically everyone and thing would die. But i found this more in depth answer for wind here. But if you look it up online you can find some more in dept answers.
The term for the significant growth in population following WWII is the "baby boom." We also now refer to those people as "baby boomers"