The answer to your question is B. However the troops were eventually withdrawn from Vietnam due to disagreements from the American people.
I believe the answer is: The establishment of sedentary village communities.
Hey there!
Rock and roll challenged the conformity of the 1950s by discussing controversial subjects that were very much frowned upon at the time. It challenged the social strictness of the time. Song topics included parties, drugs, and romantic interactions.
The culture of conformity gradually began to loosen as more and more people were affected by rock and roll music.
Hope this helps!
