Prompted by observations of seemingly related species in neighboring locales that he made during his five-year voyage around the world on the HMS Beagle, Charles Darwin conceived his theory of natural selection in which all species evolved over time from a single ancestor or very few common ancestors.

A
in which all species evolved over time from a single ancestor or very few common ancestors

B
in which all species evolve from a single ancestor or very few common ancestors over time
C
whereby over time all species evolve from a single ancestor or very few common ancestors
D
whereby all species have evolved over time from a single ancestor or very few common ancestors
E
whereby all species evolved over time from a single ancestor or very few common ancestors