Dien Bien Phu showed that the French could no longer hold on to Vietnam.
What was the battle of Dien Bien Phu?
he Battle of Dien Bien Phu was a climactic confrontation of the First Indochina War that took place between 13 March and 7 May 1954. It was fought between the French Union's colonial Far East Expeditionary Corps and Viet Minh communist revolutionaries. The United States was officially not a party to the war, but it was secretly involved by providing financial and material aid to the French Union, which included CIA contracted American personnel participating in the battle. The Battle of Dien Bien Phu, fought from March 13 to May 7, 1954, was a decisive Vietnamese military victory that brought an end to French colonial rule in Vietnam.
Therefore, (C) option is the correct answer.
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