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: transportation technology is used for moving people, Fact2: Model rocketry is an exciting way to study transportation technology., Question: Model rocketry can be used to study how people are what? (A) able to read (B) warm (C) dead (D) living (E) moved (F) born (G) humans (H) moved by emotion
[EX A]: E

[EX Q]: Fact1: Mammals have a layer of fat under the skin to help insulate the body., Fact2: Glass insulation keeps beverage warm for hours., Question: What keeps mammals warm? (A) evaporation (B) Animal fur (C) staying warm (D) sweating (E) They have thick fur (F) with their fur (G) a layer of fat (H) Veins and arteries.
[EX A]: G

[EX Q]: Fact1: Most invertebrates have a nervous system., Fact2: Jellyfish and insects are invertebrates., Question: What has a nervous system? (A) Nerve tonic (B) Jellyfish (C) Air (D) fur seals (E) Cardiovascular system (F) animals (G) chickens (H) elephants
[EX A]:
B