How did the vietnam war affect politics in the united states?

A. It forced american politicians to expand the scope of the war
B. It allowed antiwar leaders to dominate congress and the presidency.
C.It limited the political power of groups that opposed government policies.
D. It led many Americans to question their political leaders honesty.

Explanation- The Excerpt Below Is From The "NY Times" it shows how President Eisenhower lied to US Soilders About the losses DURING THE WAR and later the death toll would soon be discovered at 58K Deaths.

America didn’t just lose the war, and the lives of 58,000 young men and women; Vietnam changed us as a country. In many ways, for the worse: It made us cynical and distrustful of our institutions, especially of government. For many people, it eroded the notion, once nearly universal, that part of being an American was serving your country.

Vietnam changed the way we looked at politics. We became inured to our leaders lying in the war: the fabricated Gulf of Tonkin incident, the number of “pacified provinces” (and what did “pacified” mean, anyway?), the inflated body counts.

People talked about Johnson’s “credibility gap.” This was a genteel way of saying that the president was lying. Then, however, a credibility gap was considered unusual and bad. By the end of the war, it was still considered bad, but it was no longer unusual. When politicians lie today, fact checkers might point out what is true, but then everyone moves on.