The four Japanese islands are
(A) Honshu, Luzon, Hainan, and Guam.
(B) Kyushu, Taiwan, Ryukyu, and Kamchatka.
(C) Shikoku, Kyushu, Hokkaido, and Honshu.
(D) Okinawa, Tinian, Ryukyu, and Diego Garcia.
(E) Olane, Hokkaido, Sakhalin, and Shikoku.
Answer: C.