TOEFL Listening: TPO-TOEFL阅读TPO - UH3I1Y9XZK38SW5HN$

Which of the following statements about commensalism can be inferred from paragraph 1? A. It excludes interactions between more than two species. B. It makes it less likely for species within a community to suivive. C. Its significance to the organization of biological communities is small. D. Its role in the structure of biological populations is a disrupti