Which sentence BEST expresses the central ideas of the passage?
Zebra mussels can adapt to a variety of environments,
O but their ability to adapt to slightly salty water is of
special concern.
O
O
O
Zebra mussels have spread from oceans to lakes,
causing other mussel species to become extinct.
O
Zebra mussels are adaptable mollusks, and they can
survive on land for several days.
O
Zebra mussels have spread rapidly, threatening other
species.