Which of the following can be inferred from paragraph 4 about Tokyo Bay? A. The coastal land currently available is smaller than it was during the Japan period. B. The height of raised beaches around Tokyo Bay is a poor indicator of ancient sea levels. C. The water temperature in Tokyo Bay is lower at present than it was during the Jomon period D. Tectonic movement during the Jomon period was not responsible for the formation of Tokyo Bay's raised beaches.