Which Observations of Species Distribution Across Earth Support the Theory

Multiple Choice

Which observations of species distribution across Earth support the theory of common descent?

A) All continents contain nearly identical organisms.
B) Each part of Earth contains life forms perfectly designed for that region.
C) One can see similarities in organisms that are found in close proximity, but each population has adaptations that suit the organisms to their particular habitat.
D) There are very few similarities among life forms on different tropical islands.