Question

which reveals problems in south vietnam during the early 1960s?
the corrupt president ngo dinh diem was overthrown and assassinated.
the gulf of tonkin attack led the united states to invade south vietnam.
the election of ho chi minh to the presidency caused turmoil and disagreement.
the invasion of south vietnam by china forced it to depend on the united states.

Explanation:

• Option 1: Ngo Dinh Diem was the president of South Vietnam. His corruption and autocratic rule led to widespread discontent. His overthrow and assassination in 1963 (early - 1960s context) showed the internal political instability and problems within South Vietnam.
• Option 2: The Gulf of Tonkin incident (1964) was used as a pretext for increased U.S. military involvement (not an invasion in the traditional sense at that moment) in Vietnam, but it was more about U.S. escalation rather than a direct internal South Vietnamese problem.
• Option 3: Ho Chi Minh was the leader of North Vietnam, not South Vietnam. So his election (which was in North Vietnam) had no direct bearing on South Vietnamese internal problems.
• Option 4: There was no large - scale invasion of South Vietnam by China. South Vietnam's dependence on the U.S. was more due to its own weak military and political situation and the Cold War context rather than a Chinese invasion.

Answer:

The corrupt President Ngo Dinh Diem was overthrown and assassinated.