Choose from: A. ligt B. moss C. Frog D. tube E. clam F. two G. size H. Aves

Fact 1: Fish have a circulatory system with a two-chambered heart. Fact 2: Fish Fish are the ultimate aquatic organism. Given the two facts above, the ultimate aquatic organism has a circulatory system with a how many chambered heart.?
Answer:
F.