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: if a neutral atom loses an electron then an atom with a negative charge will be formed, Fact2: If an atom loses an electron, it is then positive., Question: what can an atom be? (A) Energy. (B) energy (C) microscopic (D) dangerous (E) small (F) nucleus (G) an object (H) negative
[EX A]: H

[EX Q]: Fact1: Roundworms may be free-living or parasitic., Fact2: Roundworms make up the roundworm phylum, Nematoda., Question: What can the phylum Nematoda be? (A) dangerous (B) parasitic (C) horses (D) meiosis (E) more abundant (F) graptolites (G) homogenous (H) phytoplankton
[EX A]: B

[EX Q]: Fact1: completing a circuit causes electricity to flow through that circuit, Fact2: When electric current is flowing, power is produced., Question: Power is produced when what happens? (A) circuit is opened (B) circuit is broken (C) heating liquids (D) forest is destroyed (E) circuit is burned out (F) circuit is completed (G) heat energy (H) chemical reaction
[EX A]:
F