Dien Bien Phu marked the end of the French colonial rule in Vietnam. The best way to explain Dien Bien Phu is:
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A
where French and Viet Minh leaders met to discuss French preparations to leave Vietnam
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B
battle in which combined Viet Cong and Viet Minh forces overwhelmed the French position with a flanking action combined with a heavy artillery barrag
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C
battle in which the Viet Cong were defeated by their Viet Minh counterparts
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D
Attacking Viet Minh forces tunneled behind the French defences and overran the French position.