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").

[EX Q]: 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
[EX A]: D

[EX Q]: Fact1: smoking tobacco decreases stamina, Fact2: Manual dexterity and physical stamina are vital., Question: What decreases manual dexterity? (A) Dehydration (B) lifting weights (C) hypothyroidism (D) prolonged thirst (E) working out (F) eating healthy (G) smoking tobacco (H) Abnormal cell growth
[EX A]: G

[EX Q]: Fact1: a drought can change the color of an environment from green to brown, Fact2: Due to the drought, there is no water., Question: What can change the color of an environment from green to brown? (A) the ocean (B) a lack of water (C) rain (D) harmful substances (E) sleet (F) deforestation (G) Greenhouse gases (H) Greenhouse gasses
[EX A]:
B