The Prediction, During the Early 1800s, That Our Human Population

The prediction, during the early 1800s, that our human population would eventually reach a point where we cannot sustain ourselves has not occurred. Why?

A) Humans continue to find ways to enhance environmental quality, thus enabling more people to be supported.
B) Technological advances unforeseen at that time increased the carrying capacity to a greater extent and faster than predicted.
C) The two world wars and the AIDS crisis caused such massive mortality that the human population has stabilized.
D) Dramatic reductions in fertility rates ended population growth before the crisis point was reached.
E) The prediction was wrong; human populations can grow indefinitely.