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").

Input: Consider Input: Fact1: volcanic ash in the atmosphere decreases the temperature by blocking the sun, Fact2: Ash clouds are a particular problem for aircraft., Question: What are particular problems for aircraft in the atmosphere? (A) transportation (B) clog airways (C) extremely low humidity (D) volcanic clouds (E) feedback mechanisms (F) negative feedback (G) gas spreads in the air (H) very complex

Output: D


Input: Consider Input: Fact1: Gymnosperms are vascular plants that produce seeds in cones., Fact2: Gymnosperms are the plants that are known as evergreens., Question: What are vascular plants that produce seeds in cones? (A) evergreens (B) it needs them (C) Leptospirosis (D) epidermal (E) Conifers (F) white (G) Newton (H) more abundant

Output: A


Input: Consider Input: Fact1: bad weather decreases visibility while driving, Fact2: While driving to the Small Boat Harbor tournament site, the fog had taken visibility to near zero., Question: what takes visibility to near zero? (A) moving plates (B) clear skies (C) a speedometer (D) road bends (E) Seisometers (F) bad weather (G) mountain air (H) lack of rain


Output: F