TOEFL Reading: ETS-TOEFL阅读机经 - PBF697SKC38GN6B0L$

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 biogeography it is common to consider and study the effects of plant and animal species as they are distributed within environments where humans live. B. Biologists who study environments in which pi ants and animals are distributed have arrived at interpretations or explanations for how species succeed, but these may not be correct. C. To understand plant and animal distribution patterns correctly, biologists must consider the role of hum an beings in the biogeography of species D. It is common for biologists who try to understand the effects of humans on their environments to be incorrect in their explanations of certain distribution patterns of plants and animals.