Which effect did the Vietnam War have on Lyndon Johnson's presidency?
a. Profits from the war helped funds Johnson's domestic anti-poverty programs.
b. Protests and frustration over the war led him to refuse to run for a second full term in 1968.
c. Early defeats led him to admit the war was a mistake and withdraw U.S. troops.
d. The war made him the most popular president in history when he finally left office.