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").

[Q]: Fact1: Aging occurs as cells lose their ability to divide., Fact2: Death is attributed to the infirmities of old age., Question: What occurs as cells lose their ability to divide? (A) illness (B) Winter (C) disease (D) death (E) youth (F) die (G) black holes (H) cell growth
[A]: D


[Q]: Fact1: unequal heating of Earth 's surface by the Sun causes global wind patterns, Fact2: Wind belts in the Atlantic Ocean include the trade winds and the prevailing westerlies ., Question: What causes the westerlies? (A) flow of electrons (B) Ocean currents (C) Precipitation (D) to move people (E) Drought (F) scattered light (G) Uneven heating by the sun (H) exposure to cold
[A]: G


[Q]: Fact1: the emission of sulfur dioxide causes acid rain, Fact2: An erupting volcano emits sulfur dioxide., Question: What causes acid rain? (A) Pesticides (B) fossil fuels (C) remains of prehistoric life (D) chlorofluorocarbons (E) energy of moving objects (F) an erupting volcano (G) harmful substances (H) forest is destroyed
[A]:
F