TOEFL Listening: TPO-TOEFL阅读TPO - 41Z4CDSRTK2P5K4ON$

According to paragraph 5, Spartina negatively affects wildlife in estuaries by A. trapping fish and waterfowl in sediment B. preventing oysters from transplanting successfully C. turning mudflats into high marshes and salt meadows D. expanding the marshy fringes of salt meadows