Answer: C. It was considered part of the Japanese homeland.
Iwo Jima was widely considered as part of the Japanese homeland and it was strongly believed that if Iwo Jima left, the entire Japan would leave as well. Japan had no choice but to defend the homeland irrespective of the costs. As the samurai traditions taught, the general in charge of resisting, Tadamichi Kuribayashi, there was an order to die rather than surrender. The Japanese needed more time to organize and regroup their defense but at this time, a bigger American army had already entered the island and as a result, the Japanese were erased from that island. The Americans were quick to raise their flags and this practically dishonored and morally discouraged the Japanese. The raising of the flag sent a clear message to the world that the USA had once again taken victory against the Japanese.