Species Richness Is Generally Higher on Larger Islands Because ____

Species richness is generally higher on larger islands because ____.

A) more colonists from mainland areas will happen upon a larger island because of its size only
B) bigger islands offer a wider variety of different habitats only
C) larger islands can support larger populations of species than smaller islands only
D) more colonists from mainland areas will happen upon a larger island because of its size and bigger islands offer a wider variety of different habitats only
E) more colonists from mainland areas will happen upon a larger island because of its size, bigger islands offer a wider variety of different habitats, and larger islands can support larger populations of species than smaller islands