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").

Example Input: Fact1: Most people can survive only a few days without water., Fact2: Water is the best fluid for hydration., Question: What can people only survive a few days without? (A) dehydration (B) hydration (C) bacteria (D) sodium (E) food (F) yogurt (G) Chlorophyll (H) oxygen
Example Output: B

Example Input: Fact1: Viruses contain DNA but not much else., Fact2: All viruses consist of RNA or DNA and a protein coat., Question: what do viruses contain? (A) Mass (B) DNA (C) SNPs (D) RNA (E) acid (F) gene (G) ovum (H) host
Example Output: D

Example Input: Fact1: Echinoderms have a unique water vascular system with tube feet., Fact2: Echinoderms are represented by the starfish., Question: What kind of animals has a water vascular system with tubed feet? (A) animals (B) starfish (C) reeds (D) insects (E) warm-blooded (F) sponges (G) sea coral (H) four limbs
Example Output:
B