What was the Tet Offensive?

The Tet Offensive was a coordinated series of North Vietnamese attacks on more than 100 cities and outposts in South Vietnam. The offensive was an attempt to foment rebellion among the South Vietnamese population and encourage the United States to scale back its involvement in the Vietnam War. Though U.S. and South Vietnamese forces managed to hold off the attacks, news coverage of the massive offensive shocked the American public and eroded support for the war effort. Despite heavy casualties, North Vietnam achieved a strategic victory with the Tet Offensive, as the attacks marked a turning point in the Vietnam War and the beginning of the slow, painful American withdrawal from the region.

Ithink the answer is d but don’t answer it. i need points.