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: a seismometer is used to measure the strength or magnitude of an earthquake, Fact2: Earthquakes are measured on a scale of 1 to 10., Question: How do we grade earthquakes (A) Seisometers (B) Cladistics (C) feedback (D) Measuring the ground (E) Check out the sky (F) classified (G) Taking temperature (H) the Himalayas
[EX A]: A

[EX Q]: Fact1: Playing is just one of many ways that mammals and other animals learn how to behave., Fact2: Acting is about behaving., Question: What is one of the ways that mammals and other animals learn how to act? (A) sleeping (B) Movement (C) mating (D) exercise (E) eating (F) sound (G) playing (H) motion
[EX A]: G

[EX Q]: Fact1: Carbon monoxide is a gas produced by furnaces and other devices that burn fuel., Fact2: Cabins have wood burning stoves and propane furnaces., Question: What gas is produced by burning propane? (A) Greenhouse gases (B) Sulfur dioxide (C) gasoline (D) Carbon monoxide (E) hydrocarbons (F) carbon dioxide (G) dangerous (H) heating liquids
[EX A]:
D