Hemocyanin

Hemocyanin:

A) combines irreversibly with oxygen for transport within the body of various organisms.
B) is bright red in color when combined with oxygen.
C) has an iron-porphyrin group that is responsible for oxygen transport.
D) is a respiratory pigment found in the blood of some invertebrate and vertebrate species.
E) is a respiratory pigment that is colorless when deoxygenated.