TOEFL Reading: ETS-TOEFL阅读机经 - MY0PQ43AC74MM3R9L$

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. In the world as a whole, flowering plants are much more common than ferns, but in Hawaii the opposite is true. B. A wide variety of plants, including 225 flowering plants and 135 ferns, were probably brought to Hawaii by wind. C. Ferns are well suited to the windy conditions in Hawaii, as demonstrated by their high diversity compared to flowering plants. D. Hawaii has a higher proportion of ferns to flowering plants than the world as a whole because many of its colonists arrived by wind.