yoyozjm1228

one of a group of closely related plants that thrive in soil with high

concentrations of metals that are toxic to most other plants.

以上是题目里的原文，定语从句修饰closely related plants，所以这个related

plants指那些能在高金属含量土壤中活下来的植物。

所以选C没有问题了吧？

个人理解，请指教。