Which One of the Following Factors Was Not Important in Creating

Multiple Choice

Which one of the following factors was not important in creating the adaptive radiation of Drosophila in the Hawaiian islands?

A) The Hawaiian islands are an archipelago.
B) New islands are constantly being formed.
C) High rates of mutation due to radioactive materials in the lava flows.
D) The existence of land islands called kipukas.
E) The presence of unoccupied niches.