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: an animal usually requires a warm body temperature for survival, Fact2: Mammals are also warm-blooded and are covered with hair or fur., Question: What helps maintain body temperature? (A) hats (B) Lift (C) the inside of a refrigerator (D) fur (E) skin (F) arctic winds (G) freezing water (H) hair
[EX A]: D

[EX Q]: Fact1: Cancer cells divide more often than normal cells, and grow out of control., Fact2: Cancer is an example of a mutation in cells., Question: What divide more often than normal cells, and grow out of control? (A) white blood cells (B) Most plants (C) hair cells (D) skin cells (E) Smoking (F) peachleaf willow (G) mutated cells (H) cigarettes
[EX A]: G

[EX Q]: Fact1: insect bites cause harm to living things, Fact2: Actually, only the female mosquitoes bite people., Question: Which of these insects can harm living things? (A) their hosts (B) eukyarotes (C) Kill them (D) cause their death (E) parasites (F) Female mosquitoes (G) tapeworms (H) a pathogens
[EX A]:
F