The Virtcong soldiers would use Guerrila Warfare, and tactics like sneaking up and attacking the filthy Americans.
It's mainly because of A and B, because after the war, the industrial resolution happened, and farmers are replaced by machines, farmers has no work to do, their speed is no compare to the machines, so they must move to another place. Also the population in Europe is growing in a extremely fast speed. Hope that helps :)
the term alignment means when you align something
the answer to your problem is option b
