Which statement best describes U.S. involvement in Vietnam?

A) The Tet Offensive brought the Vietnam War to a successful military conclusion by flooding the north with soldiers from the south.

B) The Vietnam War officially ended with the Gulf of Tonkin Resolution that President Johnson urged Congress to approve and President Nixon put into action.

C) U.S. presidents, beginning with Eisenhower and continuing with Kennedy, Johnson, and Nixon, involved the United States in an undeclared war in Vietnam sending over 500,000 U.S. soldiers into combat.