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.
A, because it explains a lot of the reason everything happened
I would say that A is the correct answer.
Answer:
D) Industry in the north grew rapidly as a result of higher production needed for war
Explanation:
I took the quiz.