The correct answer is A. It led France to withdraw troops from Indochina but inspire friends to do it indirectly rule Vietnam.
Step-by-step explanation
The Indochina War was a colonial conflict that took place in Southeast Asia from 1946 to 1954 in which H.o Chi Mi.nh's Vi.et Mi.nh army fought against the rule of France. One of the main causes was the claim of independence from French Indochina. As a result of this war, France was defeated in 1954, so it had to withdraw its dominance from this region. Later, the Geneva Conference decided to separate Vietnam into two sovereign states and hold a referendum a year later for the Vietnamese to decide between reunification or final separation. However, this referendum was not carried out due to the non-compliance of South Vietnam (which was influenced by the French rule), so from there the Vietnam War and the American influence (allying with France) in Vietnam of the South. According to the above, the correct answer is A.