TOEFL Listening: TPO-TOEFL阅读TPO - TW06S4J761356ZUNN$

According to paragraph 4, why do many authors prefer the term "association" to "community" when describing a climax plant formation? A. Because the term "association" does not suggest the presence of a tight network involving interactive communication. B. Because the term "association" indicates that the grouping is not necessarily beneficial to all members. C. Because the term "community" indicates continuing dynamic development that a climax formation does not have. D. Because the term "community" suggests an organization that has been designed for a specific purpose.