Which best describes why two Jima was significant in U.S. attempts to reach Japan?

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Explanation:

The island of Iwo Jima was significants to U.S. army because it provided a staging area for attacks on the Japanese main islands known by the name of Operation Downfall. It was also a Japanese air base from which they attacked the Mariana Islands. By conquering the island they would eliminate that problem and also cut in half the B-29s raid distance for the Operation.

The answer is A. The island had airfields that the U.S. military needed.