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: soil is formed by rocks eroding, Fact2: Rivers erode the rocks they flow over., Question: What is formed by rivers? (A) fish (B) soil (C) rain (D) bamboo (E) spring (F) clouds (G) kayaks (H) NaCl
[EX A]: B

[EX Q]: Fact1: smoking causes direct damage to the lungs, Fact2: Cigar smoking is on the rise., Question: what causes direct damage to the lungs? (A) breathing (B) oxygen (C) influenza (D) parasites (E) cigars (F) germs (G) steroids (H) respiring
[EX A]:
E