The sumatran rhinoceros is one of the world's rarest mammals. found only in borneo, malaysia, and sumatra, there are estimated to be only about 400 rhinos alive. any more habitat loss will probably doom the rhinoceros. without significant resources established, the rhino will remain ________________. however, if nature preserves are set aside for the rhino and the population expands to a few thousand, it will probably be listed as _____________________.
a.extinct, endangered
b.extinct, threatened
c.endangered, threatened
d.threatened, endangered