During World War II, US naval forces were able to intercept the Japanese fleet before it reached Midway because

U.S. codebreakers had deciphered enough Japanese naval messages to learn that Midway was the target and anticipate the timing of the attack. This let U.S. forces position their carriers near the island before the Japanese fleet arrived. Choice C, that U.S. intelligence had deciphered messages outlining the Japanese plan, is correct.

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