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: Steroid hormones are made of lipids, such as phospholipids and cholesterol., Fact2: Fats are known as lipids., Question: What are steroid hormones made of? (A) bacteria (B) fats (C) sugar (D) muscle (E) H 2 O (F) sunlight (G) the Sun (H) SO2
Example Output: B

Example Input: Fact1: Earthworms are important deposit feeders that help form and enrich soil., Fact2: Earthworms Earthworms are in the phylum Annelids., Question: What do annelids enrich? (A) magma (B) seeds (C) soil (D) Energy (E) food (F) water (G) moss (H) roots
Example Output: C

Example Input: Fact1: nuclear reactions in stars causes stars to produce light, Fact2: Light contains energy., Question: What do nuclear reactions in stars cause? (A) heat energy (B) Change colors (C) production of energy (D) hydrogen and oxygen (E) only black holes (F) destruction of energy (G) creation of life (H) harmful substances
Example Output:
C