Darwin's Main Tenet of Natural Selection Was That

Darwin's main tenet of natural selection was that

A) only the oldest live to reproduce.
B) organisms can acquire advantageous adaptations as they encounter new habitats.
C) death limits population size and those individuals that produce the most offspring are more likely to survive.
D) every organism has the potential to produce more offspring than can survive and those individuals that are better suited to their environment are more likely to survive.