It could be a variety of answers some examples could be something relating to the technology, or the advancements of this time period. Anything relating to that would be fine!
Answer:
Option: Many Americans had actually come to favor Communism over democracy.
Explanation:
Americans began to protest against the Vietnam War during the late 1960s because they felt the government has nothing to do with the situation happening in South Asia. Majority of students began to hold demonstrations, protest, and marches. America's involvement in the Vietnam War sparked a hostile among the citizens who believed America has no right to involve in the war where thousands of American soldiers were dying.
Intragroup.
An intragroup conflict is a conflict that takes place between one sector or group. The group being the United States, so their was a conflict inside the United States which makes it intragroup.
In the United States, examples of the concurrent powers shared by both the federal and state governments include the power to tax, build roads, establish bankruptcy laws, and to create lower courts.
so i would say C. is the most reasonable.