Which Species Is Least Likely to Become Extinct

Which species is least likely to become extinct?

A) A mammal species that feeds on a rare tropical orchid
B) A fish species that has hybridized with another species to produce infertile offspring
C) A fish species found in all five of the Great Lakes
D) A mammal species that can live equally well on dry land and in fresh water
E) A fish species that feeds on only rare snails found in only one small river