The correct answer is: C. The fall of Saigon led to a unified, communist Vietnam.
Step-by-step explanation
The Vietnam War was an armed conflict in the territory of Vietnam from 1955 to 1975, between the South Vietnam Forces and the United States against North Vietnam Forces with the support of the Soviet Union and China. The fall of Saigon was an event that is known as The final of Vietnam War in 1975 when the National Liberation Front of Vietnam and Armed Forces of the Democratic Republic of Vietnam (Communists forces from the north of Vietnam) took the capital city Saigon. Also, this event was the first step for the unification of Vietnam. As after this, in 1976, the Communist political party took total control and unified all the country. So, the correct answer is C. The fall of Saigon led to a unified, communist Vietnam.