tpo22阅读 第一篇第7题 求交流，求指点

CaliforniaaUID: 3411797

答案给的是A，我感觉选C啊，或者选项都不对。。。

NotAfraid2009UID: 3504100

Once established, a stand of Spartina begins to trap sediment, changing the substrate elevation, and eventually the stand evolves into a high marsh system where Spartina is gradually displaced by higher-elevation, brackish-water species.
这句话就是解答，最后一句说这个 Sparina 会逐渐被higher-elevation, brackish-water species代替。换句话说，不就是创建了一个它不能生存的环境吗。C 是adapted 跟 displace 不是刚好相反吗。lz 是不是看到了这句话and eventually the stand evolves into a high marsh system的 evolves了才选的 C。但是这句话主语不是 Spartina。