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: thick fur can be used for keeping warm, Fact2: When the body is warm, heat production is minimized., Question: thick fur can be used for minimizing what? (A) heat energy (B) heat production (C) scattered light (D) energy usage (E) freezer burn (F) movie production (G) fur production (H) Temperature
Example Output: B

Example Input: Fact1: chemical weathering causes iron in rock to oxidize, Fact2: Oxides Oxides Oxides are elements combined with oxygen., Question: Chemical weathering causes iron in rock to combine with what? (A) uranium (B) oxygen (C) cartilage (D) nothing (E) an object (F) vacuum (G) energy (H) heat
Example Output: B

Example Input: Fact1: a battery converts chemical energy into electrical energy, Fact2: Cameras use batteries., Question: What uses electrical energy converted from chemical energy? (A) sunlight (B) cameras (C) cells (D) buses (E) bacteria (F) Cars (G) dogs (H) vehicles
Example Output:
B