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: Cells are the basic units of the structure and function of living things., Fact2: Tigers are the largest of the living cats., Question: Cells are the basic units of the structure and function of what? (A) water (B) mammals (C) ice (D) tigers (E) animals (F) humans (G) plants (H) the Sun
[EX A]: D

[EX Q]: Fact1: staying warm has a positive impact on an animal 's survival, Fact2: With a thick fur coat and 4 inches of fat a bear stays warm., Question: What has a positive impact on an animal's survival? (A) four limbs (B) sensory neurons (C) low water availability (D) fur and fat (E) loss of food (F) heat energy (G) hormones (H) destruction of habitat
[EX A]: D

[EX Q]: Fact1: Glucose is used for energy by the cells of most organisms., Fact2: Glucose metabolism relates to how cells use or store glucose., Question: what do cells do with glucose? (A) live (B) grow (C) reacts (D) energy. (E) survive (F) store (G) sleep (H) move
[EX A]:
F