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: All chemical reactions require activation energy to get started., Fact2: Chemical changes are a result of chemical reactions., Question: What is required before a chemical change? (A) kinetic energy (B) energy usage (C) activation push (D) activation energy (E) activation switch (F) activation power (G) Burning fuel and air (H) Evaporation
[A]: D

[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: Hair is a fiber that is found only in mammals., Fact2: Hairs and fibers are easily shed., Question: asily shed fibers are found only in what? (A) the skin (B) mammals (C) goats (D) cows (E) loose soil (F) Animal fur (G) Winter (H) autumn
[A]:
B