Supporters typically supported the ideas of containment and domino theory.
Vietnam "hawks" or supporters of the war wanted to see Communism defeated. The war with Vietnam provided an opportunity to contain and possibly destroy Communism. They supported an "any means necessary" approach to defeat Vietnamese aggression which pulled us into war.
A. Have illusions and hallucinations
War, and Iraq - which leads to death
There are 2 answers that fits the meaning of interest groups. It is letter b and c. Interest groups are also called pressure group. This are group of people or an organization that has the concers and trying to influence public policy in thier favor. They are concerns with various issues or problems that gave them hindrances to win control of the government. They pressure the policy makers by lobbying.