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: Secondary meristem is located within and around the vascular tissues., Fact2: Plant tissues are produced from meristems., Question: What has vascular tissue? (A) rocks (B) the Sun (C) trees (D) plants (E) grass (F) Conifers (G) all plankton (H) Oak
Example Output: D

Example Input: Fact1: when the seasons change from the summer to the fall , the amount of daylight will decrease, Fact2: Daylight, sunlight, is necessary to it., Question: When the seasons change from the summer to the fall, the amount of what will decrease? (A) air (B) matter (C) Energy. (D) Solar energy (E) Light (F) sunlight (G) energy (H) planets
Example Output: F

Example Input: Fact1: a rainbow is formed by refraction of light by separating light into all different colors, Fact2: Color is the same as wavelength ., Question: What is formed by refraction of light by separating light into all different wavelengths? (A) an object (B) bushes (C) a prism (D) a rainbow (E) a cloud (F) heterotrophs (G) a mirror (H) photons
Example Output:
D