Q: _ are tetrapods.\nOptions:\n- (A) animals\n- (B) amoeba\n- (C) Frogs\n- (D) Length\n- (E) insects\n- (F) Spiders\n- (G) Snakes\n- (H) Birds
Let's think step by step below.

User
Amphibians are the first true tetrapods, or vertebrates with four limbs. Frogs are classified as amphibians. Frogs are tetrapods.
Thus, the answer is (C).
Assistant