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: Rivers are usually larger than streams., Fact2: Watersheds are creeks, streams and rivers., Question: What is a river also? (A) storing water (B) loose soil (C) dangerous (D) fertile (E) more abundant (F) watershred (G) body water (H) kinetic
[EX A]: F

[EX Q]: Fact1: Annelids are worms such as the familiar earthworm., Fact2: An earthworm has five hearts., Question: One example of an annelid has how many hearts? (A) three (B) Five (C) white (D) warm (E) four (F) strong (G) long (H) small
[EX A]: B

[EX Q]: Fact1: water causes refraction of light, Fact2: Water includes all liquids., Question: What causes the refraction of light? (A) focusing a lens (B) Chemical energy (C) fossil fuels (D) all liquids (E) a solute (F) chemical changes (G) an electron lens (H) squids
[EX A]:
D