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: 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: hydropower requires damming a river, Fact2: Hoover Dam, the first dam on the Colorado River below Grand Canyon, was built between 1931 and 1935., Question: Which of these produces hydropower? (A) deuterostomes (B) Wind Turbines (C) power stations (D) Suez Canal (E) trout (F) Old Faithful Geyser (G) Hoover Dam (H) stations
[EX A]: G

[EX Q]: Fact1: creating wood-free paper does not require cutting down trees, Fact2: To cut down a tree is like destroying a life., Question: Creating wood-free paper does not require doing what? (A) deforestation (B) destroying trees (C) Dehydration (D) kill them (E) killing insects (F) Pollution (G) competing for resources (H) to move people
[EX A]:
B