I will give 10 points and BEST ANSWER to whoever can answer this WASHINGTON STATE HISTORY question for me.

Which of the following is not a reason that Vietnam war protestors opposed America's involvement in the war?
A) They felt that America had no vital interest in Vietnam
B) They felt that America's real enemy was Cambodia.
C) They felt the conflict was a civil war between two far away countries.
D) They felt the conflict was brutal and bloody.