TPO22阅读第一篇的第八题为什么选A?

网友回答

Along the east coast Spartina is considered valuable for its ability prevent erosion and marshland deterioration; it is also used for coastal restoration;It is also used for coastal restoration projects and the creation of new wetland sites.
这句话说明了spartina在保护湿地方面的作用,也就是控制了湿地的减少.不知道我定位定的对不对,但是这一题选A我觉得没有问题.