Refer to the table.
The table shows the number of species of a group of mammals present in the tropics, the subtropics, and the temperate zone over the last fifty million years.
-Which specific hypothesis is best supported by the data in the table?

A) Speciation rates are greater in the tropics because of the abundance of land area there.
B) Extinction rates are lower in the tropics because of the abundance of land area there.
C) The evolutionary time available for diversification in the tropics has been more limited than elsewhere, since the last major disturbance occurred there more recently than elsewhere.
D) The evolutionary time available for diversification in the tropics has been greater than elsewhere, since the last major disturbance occurred there less recently than elsewhere.