Which choice completes the text so that it conforms to the convention… | Verbal SAT Question

A single specimen of G. tenellus, collected at a depth of 1,809 fathoms (3,309 meters) in the Ionian Sea, and a single specimen of G. rubescens, collected at a depth of 769 fathoms (1,407 meters) in the Indian Ocean, have been preserved as exemplars of their respective former in a repository at Washington, DC’s Museum of Natural History and the latter in a repository at the Netherlands’ Naturalis Biodiversity Center.

Which choice completes the text so that it conforms to the conventions of Standard English?

species. The

species, and the

species, the

species; the