Choose your answer from:
(a). Birds
(b). alpacas
(c). elms
(d). Clams
(e). salmon
(f). animals
(g). toads
(h). complex
Q: Fact 1: Mollusks have a circulatory system with one or two hearts that pump blood. Fact 2: Clams, oysters and snails are familiar mollusks. Given the two facts above, have a circulatory system with one or two hearts?
A:
(d).