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: nuclear reactions in stars causes stars to produce light, Fact2: And, of course, the Sun is a star., Question: What in the sun causes the sun to produce light? (A) energy of moving objects (B) hydrogen and oxygen (C) heat energy (D) water (E) solar rays (F) rotation (G) nuclear reactions (H) kinetic energy
[EX A]: G

[EX Q]: Fact1: Cells that divide uncontrollably may form a tumor, or abnormal mass of cells., Fact2: Surgery to remove the tumor is an option., Question: what might cells that divide uncontrollably need? (A) removal surgery (B) aqueous solution (C) turn to a doctor (D) an organism's body (E) kinetic energy (F) survival (G) Chemical energy (H) bioaerosols
[EX A]: A

[EX Q]: Fact1: when the body is hot , sweat is produced to cool the body, Fact2: Exercise, fever, and heat cause the body's temperature to rise., Question: what causes sweat to be produced to cool a person down? (A) exercise and fever (B) wool pants (C) the sun (D) Movement of an air mass (E) shooting stars (F) Evaporation (G) centralized nervous system (H) water vapor
[EX A]:
A