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: Hormones control many cell activities, so they are very important for homeostasis., Fact2: Hormones travel in the bloodstream to cells that are called target cells a., Question: what allows molecules to travel to control many cell activities (A) skin (B) heat energy (C) animal transport (D) bloodstream (E) Chemical energy (F) nasal passage (G) movement (H) fat tissue
[EX A]: D

[EX Q]: Fact1: electricity is used as an energy source by electrical devices, Fact2: Electrical fields result from electrical devices and televisions., Question: What is used as an energy source by television? (A) electricity (B) light (C) our nearest star (D) air (E) energy (F) satellites (G) photons (H) rocks
[EX A]: A

[EX Q]: Fact1: coal is used to produce electricity by burning in coal-fire power stations, Fact2: Coal comes from anciently buried plants, and petroleum is from animals., Question: What can ancienty buried plants produce? (A) nutrients (B) heat energy (C) scattered light (D) food and shelter (E) Earthworms (F) energy (G) eukyarotes (H) electricity
[EX A]:
H