The Northern Copperhead Is Agkistrodon Contortrix Contortrix, the Southern Copperhead

Multiple Choice

The northern copperhead is Agkistrodon contortrix contortrix, the southern copperhead is Agkistrodon contortrix mokasen, and the cottonmouth is Agkistrodon piscivorous. Therefore,

A) all are subspecies of Agkistrodon.
B) they are three distinct species.
C) the copperheads are subspecies and the cottonmouth is a separate species.
D) they are all the same species.