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: Streams may start with runoff or water seeping out of a spring., Fact2: Most water comes from precipitation., Question: What do most streams start with? (A) swamp vegetation (B) heat produced (C) loose dirt (D) Decibels (E) Veins and arteries. (F) matter vibrating (G) visible energy (H) precipitation
H

Fact1: Antigens are molecules that the immune system recognizes as foreign to the body., Fact2: Children are born with an immature immune, or defense, system., Question: What are molecules that the defense system recognizes as foreign to the body? (A) Allergies (B) lungs (C) antigens (D) bacteria (E) parasites (F) atoms (G) red blood cells (H) acetic acid
C

Fact1: a battery converts chemical energy into electrical energy, Fact2: Duracell batteries now come with a tester built into the package., Question: what converts chemical energy into electrical energy? (A) guns (B) engines (C) Firecrackers (D) cigarettes (E) Duracell (F) organ (G) heat (H) Cars

E