TOEFL Reading: ETS-TOEFL阅读机经 - 5L65WY9ZO5Q2DHQ9L$

Paragraph 1 implies which of the following about evolutionary change A. Eukaryotes have a very slow rate of evolution. B. The fossil record of evolutionary change is incomplete for the first half-billion years of animal evolution. C. Evolution has not always proceeded at the same rate. D. Evolutionary rates of change in animals were slowing down considerably before a dramatic reversal happened 1.2 billion years ago.