TOEFL Listening: TPO-TOEFL阅读TPO - A_55L2D4UP444KLQN$

Paragraph 4 suggests that where Spartina occurs naturally, an established stand of it will eventually A. create conditions in which it can no longer survive B. get washed away by water flowing through the deep channels that form around it C. become adapted to brackish water D. take over other grass species growing in the area