Priapulus, a Genus of Worms, Has a Bipolar Distribution

Priapulus, a genus of worms, has a bipolar distribution. This is evident because

A) the same individuals migrate between the Arctic and the Antarctic.
B) the same species is only present in both the Arctic and the Antarctic.
C) one species of Priapulus is found in the Arctic, while another closely related species is found in the Antarctic.
D) it is only found around the North and South Poles.
E) different species exist in the Northern hemisphere from the Southern hemisphere.