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: telephones are used for communication by two people by transmitting sound, Fact2: Cell phones are, bottom line, radios with a connection to a telephone company., Question: What are used for two people for communication with sound? (A) cell phones (B) messengers (C) energy (D) megaphones (E) A Greek letter (F) flashlights (G) gramophones (H) electricity
[EX A]: A

[EX Q]: Fact1: Butter is a fat that is a solid at room temperature., Fact2: Room temperatures between 40 and 80 Fahrenheit, or 5 and 27 Celsius, are best for storage., Question: When is butter a solid? (A) rapid changes occur (B) protect eyes in the lab (C) around 5 to 27 degrees Celsius (D) one effect of diabetes (E) protein foreign to the body. (F) natural atmosphere component (G) reduce acidity of food (H) speed at which sound moves
[EX A]: C

[EX Q]: Fact1: when a river floods , that river deposits soil in flood plains, Fact2: By far the mightiest of the great rivers is the Amazon ., Question: When the Amazon floods it deposits what in flood plain? (A) earth (B) cities (C) rocks (D) dirt (E) seawater (F) Sand (G) saltwater (H) soil
[EX A]:
H