False, I believe. I hope this helped! Good luck :)
Nationalism is an idea and movement that holds that the nation should be congruent with the state. As a movement, nationalism tends to promote the interests of a particular nation (as in a group of people), especially with the aim of gaining and maintaining the nation's sovereignty (self-governance) over its homeland.
Answer:
B. forming committees of correspondence
Answer:
The Soviet Union joining in to help northern Vietnam caused America to join sides with the southern Vietnam to help fight against communist which led to US troops in Vietnam.
Explanation: join the fox army.