Many Introduced Species Have Had Deleterious Effects on Communities and Ecosystems

Multiple Choice

Many introduced species have had deleterious effects on communities and ecosystems because

A) coevolved parasites and pathogens are absent.
B) the introduced species are long-lived.
C) predators prefer the introduced species, and the local prey therefore proliferate to dangerously high levels.
D) the community from which they came lost an important predator, competitor, or parasite.
E) human beings do not know how to appreciate them.