TOEFL Listening: ETS-TOEFL听力机经 - 549PG30LWH5D4WI3P$

What does the professor imply when she discusses the current warming period? A. The consequences of the current warming period will not be as serious as most scientists believe. B. The current warming period is progressing more slowly than previous warming periods. C. Arctic temperatures today are similar to temperatures during previous warming periods. D. The fast pace of the current warming period will threaten polar bears' long-term survival.