Which of the Following Was Charles Darwin's Most Significant Original

Multiple Choice

Which of the following was Charles Darwin's most significant original contribution to understanding both the unity and diversity of life?

A) He documented examples of organisms that had evolved over time.
B) He proposed a mechanism to explain the process of evolution.
C) He explained the relationship between genes and evolution.
D) He observed that individuals in a population generally displayed variation for a number of traits.
E) He suggested that survival depends upon competition.