The correct answer to this question is the Chinese.
<em>It is true that the Vietnamese lead independent movements against the Chinese.</em>
The first China invasion of Vietnam was in 111BCE. The Han Dynasty conquered Nam Viet. The second time China controlled Vietnam was in 618. The Tang Dynasty expanded its dominions so far and it reached Vietnam. The Chinese transmitted its philosophy, art, and poetry to the Vietnamese. In 938, Ngo Quyen led the Vietnamese Independence. So, it’s true that the Vietnamese lead independent movements against China.
The correct answer here is the option D.
Tet offensive was a major offensive undertook by the Viet Cong along with the North Vietnamese People's Army of Vietnam and it showed the shocked South Vietnam and its American allies that the war was actually far from over. This also led to the loss of the support for the war in the States.
They lose their highly educated citizens to the U.S.