A. 7
B. 8
C. 9
D. 6
Submitted by: Ghulam.abbas
Octopuses have 9 brains because, in addition to the central brain, each of 8 arms has a mini-brain that allows it to act independently. Octopuses have blue blood because they have adapted to cold, low oxygen water by using hemocyanin, a copper rich protein.
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