I'll give you a question, please answer with step-by-step reasoning process.
Which animals have a circulatory system?\nOptions:\n- (A) insects\n- (B) mammals\n- (C) fur seals\n- (D) sharks\n- (E) cows\n- (F) squids\n- (G) a fish\n- (H) chickens

(F)
Mollusks have a circulatory system with one or two hearts that pump blood.

Interestingly, a squid is also a mollusk.

Squids have a circulatory system.

.

So, the final answer is (F)