Evolutionary Biologist:Natural selection, in ensuring the ‘survival of the fittest’, has brought us to a pinnacle of perfection. Or at least, since we are, to be sure, not quite perfect yet, the adaptive process of natural selection will ultimately make us so. However, the process of adaptation takes time. And in the time it takes, things might have changed, so that just when natural selection has made us nicely adapted to one set of living conditions, these no longer apply.

Which of the following matches best with the idea presented by the biologist above?

(A) A scientist had extensively researched on systemic evolution, but eventually abandoned his work after having learned that a similar research work has already been completed.
(B) Since a long time ago, humans developed a natural taste for junk food, and junk food is naturally enjoyed by anyone. But, junk foods pose huge amount of health risk, so now humans have refrained from consuming these foods.
(C) Scientists have found toxic chemicals in city X's water fountains. However, the residents of the city have shown no sign of health issues.
(D) Humans are prone to make errors. On the contrary machines make fewer errors and can perform tasks efficiently. Since humans created machines, they have made progress towards infallibility.
(E) A flock of birds migrate from country X to country Y in the winter. During their journey, only few of them survive because of the extreme weather conditions surrounding country Y. Even so, the survivors learn to adapt the new conditions perfectly.