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: global warming is when worldwide temperature increases, Fact2: Global warming is caused by carbon dioxide trapped in the atmosphere., Question: What does carbon dioxide cause? (A) skateboards (B) Greenhouse gases (C) Worldwide temperature increase (D) major threat to health (E) direct damage to the lungs (F) running (G) a lot of human deaths (H) Temperature decrease
C

Fact1: an animal usually requires a warm body temperature for survival, Fact2: Mammals are also warm-blooded and are covered with hair or fur., Question: What helps maintain body temperature? (A) hats (B) Lift (C) the inside of a refrigerator (D) fur (E) skin (F) arctic winds (G) freezing water (H) hair
D

Fact1: a laser is used for producing light, Fact2: And rays of light shine on the ground., Question: What can a laser produce? (A) energy (B) power (C) a beanstalk (D) a flowering plant (E) fibers (F) a wave (G) a ray (H) a piece of paper

G