Which of these sentences from Jack London's "The Human Drift" is an example of naturalist writing?

A. There have been drifts from east to west and west to east, from north to south and back again, drifts that have criss-crossed one another, and drifts colliding and recoiling and caroming off in new directions.
B. Man early discovered death. As soon as his evolution permitted, he made himself better devices for killing than the old natural ones of fang and claw.
C. In the misty younger world we catch glimpses of phantom races, rising, slaying, finding food, building rude civilisations, decaying, falling under the swords of stronger hands, and passing utterly away.
D. Perhaps most amazing has been the South Sea Drift. Blind, fortuitous, precarious as no other drift has been, nevertheless the islands in that waste of ocean have received drift after drift of the races.

Answer: I would also contend that the right answer is the C) "In the misty younger world we catch glimpses of phantom races, rising, slaying, finding food, building rude civilisations, decaying, falling under the swords of stronger hands, and passing utterly away."

Explanation: Naturalism, as a literary genre, is characterized by a very extreme form of realism, which often stresses the difficulties that humans face in order to survive in an often hostile environment. Determinism is a common and key theme in naturalistic works: individuals attempt to control their fate, but the universe is indifferent to their will and impose its own conditions. In this excerpt, the author is contending that humans have constantly struggled to survive. Some have been stronger than others, but those that have not excelled have fought to no avail and have passed away unnoticed. Naturalistic works tend to be pessimistic and violent, as this excerpt illustrates.