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: extreme heat and pressure change rock into metamorphic rock, Fact2: Slate is a metamorphic rock., Question: What rock is formed by extreme heat and pressure (A) erosion (B) crust (C) calcite (D) Slate (E) dead (F) forces (G) fibrous (H) complex

Output: D


Input: Consider Input: Fact1: knowledge of the stars can be used to navigate, Fact2: Of course, astronomers also study stars., Question: What can be used to navigate? (A) music (B) backbones (C) astrology (D) cilia (E) magic (F) sponges (G) astronomy (H) lamphreys

Output: G


Input: Consider Input: Fact1: Pressure receptors are found mainly in the skin., Fact2: Skin is comprised of two layers, the epidermis and dermis., Question: where are pressure receptors mainly found? (A) Veins and arteries. (B) h2o (C) epidermis and dermis (D) an organism's body (E) gravity and density (F) heat or cold (G) Earth orbiting the Sun (H) salt and pepper


Output: C