Question

To protect against introduced species, some states have laws preventing oceangoing ships from dumping ballast water in harbors or posts. What does this indicate about introduced species?
many are fish that live in salty ocean water
many are native to freshwater harbors
many are transported in ballast water
many can live a long time without food

Answer 1

I would choose C.
A isn't the best of option because it does not directly mention fresh vs. salt water.
B does not make sense because it is discussing introduced species not native ones.
And D literally just has no relevance.

I would go with C because it is literally drawing attention to introduced species because of dumping ballast waters.