Detailed Instructions: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Q: Fact1: Amphibians are the first true tetrapods, or vertebrates with four limbs., Fact2: Tetrapod classification Tetrapods are monophyletic., Question: what are monophyletic with four limbs ? (A) animals (B) mammals (C) amphibians (D) warm-blooded (E) Most plants (F) alpacas (G) Conifers (H) graptolites
A:
C