TOEFL Reading: ETS-TOEFL阅读机经 - 0GG11ZYQULLHSNK1L$

Which of the following best describes the role of the explanation offered in paragraph 2? A. Paragraph 2 questions this explanation by providing counterexamples of some trees. B. Paragraph 2 presents additional evidence supporting this explanation. C. Paragraph 2 discusses some additional reasons why trees shed branches D. Paragraph 2 points out some additional consequences for trees besides the shedding of branches