Which of the following events led to a sharp decline in President Johnson's popularity? A)the Korean War B)the Vietnam War C)the Watergate Scandal D)the Bay of Pigs Invasion

B) the Vietnam War

President Lyndon B. Johnson's popularity began to sharply decline as a result of the Vietnam War. The war was increasingly seen as unwinnable by the American public, and its rising costs, both in terms of finances and American lives, caused widespread disillusionment and protest. As the conflict dragged on, more and more Americans began to question the government's policies and the justification for being in Vietnam. The Tet Offensive in 1968, in particular, played a significant role in changing public opinion. Despite government reports that the war was being won, the Tet Offensive demonstrated that the North Vietnamese and Viet Cong were still capable of launching significant attacks. This contradiction between the official statements and the reality on the ground further eroded trust in Johnson's administration.