I think the answer is D)the U.S constitution
Deep South of the United States
Abraham Lincoln was the first president elected under the <u><em>Republican</em></u> Party.
It was primarily "A.) 1967/1968" that marked the heated point of the Vietnam war as well as worldwide protests against the conflict, since this is when enough atrocities from the war had been made public that popular opinion of the conflict in the US was incredibly sour. <span />