Answer the following question, with explanation first.
What has circulatory system with a two-chambered heart?\nOptions:\n- (A) sharks\n- (B) trout\n- (C) pan\n- (D) toads\n- (E) Birds\n- (F) animals\n- (G) mammals\n- (H) Man

(B)
Fish have a circulatory system with a two-chambered heart.

Fish species include salmon and trout.

Salmon and trout have a circulatory system with a two-chambered heart.

.

The final answer: (B)