Answer:
D. An air base on Iwo Jima made it possible for Allied bombers to reach Japan.
Step-by-step explanation:
Although the battle was fought during 1945, during the last phase of the war, it was a crucial turning point during the war. Although were heavily defeated, Japanese didn't accepted to surrender. Still, as the States took the air base this enabled them the control over the whole front. It was just a matter of time when the war will end. And it ended a couple months later.