One Major Problem with Human Stress on Ecosystems Is That

One major problem with human stress on ecosystems is that ______.

A) ecosystems are too biodiverse to respond to human-caused threats
B) natural selection cannot keep up with the constant human-caused threats
C) evolution tends to occur more rapidly while under stress
D) newly introduced species almost never thrive in unfamiliar ecosystems
E) All of the above answers are correct.