Read the Following Scenario and Answer the Question Below

Read the following scenario and answer the question below.
The western United States contains a series of tall mountain ranges that also extend far down into Mexico. The largest of these ranges are the Rockies and the Sierra Madres, but they are all part of the same mountain- building event that occurred many millions of years ago, and they all have similar features. Much of the vegetation on these mountaintops is the same, or very similar, and they are often referred to as the "Sky Islands" because of their similarity to each other and their isolation from the lower, drier areas surrounding them.
-Because the pine- oak woodlands of the Sky Islands of Mexico and the United States have a large number of endemic species and have lost large amounts of habitat to development, they have been listed as one of the _________________

A) extirpation areas of the Endangered Species List
B) biodiversity hotspots of Conservation International
C) transport areas of CITES
D) umbrella species areas for Convention on Biological Diversity
E) keystone areas of the Endangered Species List