TOEFL Listening: TPO-TOEFL阅读TPO - M_U2CI426458S5AVN$

Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. Hutton realized that if these geologic processes have always occurred at about the same rate as they do today, Earth's history is huge in comparison with human history. B. Hutton's examination of sedimentary layers led him to conclude that throughout Earth's long history, geologic processes have been generally the same as they are today. C. In spite of Hutton's contributions to the understanding of geologic processes, what is known about Earth's history is minor compared with what is known about human history. D. Hutton's examination of sedimentary layers was quite vigorous for his day, and his conclusions about geologic processes are among the most significant in human history.