GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - YLK7BH822M4DXOQ4J

Which of the following statements about the connection between aboveground plants and belowground soil communities can be inferred from the passage? A. Because of the nature of the link between above-and belowground communities, many soil communities are deficient in nutrients. B. The extent to which soil communities are dependent on aboveground plants is extremely variable from one soil community to another. C. Because different plants supply resources to soil communities in different ways, distinctive soil communities form under different plant communities.