Why did Richard Nixon use the phrase "silent majority" to refer to moderate
and conservative Americans who supported the Vietnam War?

A. Surveys in 1973 showed that 85 percent of Americans were in
favor of the Vietnam War but didn't say so.

B. Antiwar protestors threatened violence against anyone who
publicly supported war, so many people kept quiet.

C. He claimed his supporters saw no need to stage protests, so they
got no media attention.

D. Nixon's supporters considered war protestors un-American, so
their votes did not count in his election,