Answer: The Supreme Court and other federal courts (judicial branch) can declare laws or presidential actions unconstitutional, in a process known as judicial review. By passing amendments to the Constitution, Congress can effectively check the decisions of the Supreme Court
Explanation:
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.
US land was not rich in much of anything, so it was important to get food and clothing from somewhere.