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").

Fact1: gases released during the use of fossil fuels causes global warming, Fact2: Oil is a fossil fuel., Question: Gases released during the use of oil causes what? (A) global warming (B) better weather on the earth (C) colder weather (D) less oily air (E) The atmosphere (F) flooding (G) Temperature (H) cleaner air to breathe
A

Fact1: All chemical reactions require activation energy to get started., Fact2: Chemical changes are a result of chemical reactions., Question: What is required before a chemical change? (A) kinetic energy (B) energy usage (C) activation push (D) activation energy (E) activation switch (F) activation power (G) Burning fuel and air (H) Evaporation
D

Fact1: thick fur can be used for keeping warm, Fact2: Sheep are mammals with thick, woolly fur, and hoofed feet., Question: what can be used for keeping warm? (A) hats (B) carbon molecules (C) sheep (D) clouds (E) protein (F) hair (G) keratin (H) ice cubes

C