In the American Midwest, Surveys Show That Anywhere from 82

In the American Midwest, surveys show that anywhere from 82.6 to 99.9 percent of the once extensive tallgrass prairie ecosystem has been lost to agriculture in 12 states since European settlement began.The remaining prairie is in scattered fragments among croplands.Based on the theory of island biogeography, compared to the original tallgrass prairie ecosystem, the remaining prairie fragments would be expected to show

A) less isolation.
B) higher extinction rates.
C) lower extinction rates.
D) higher species diversity.
E) higher immigration rates.