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").

[Q]: Fact1: chemical weathering causes iron in rock to oxidize, Fact2: Oxides Oxides Oxides are elements combined with oxygen., Question: Chemical weathering causes iron in rock to combine with what? (A) uranium (B) oxygen (C) cartilage (D) nothing (E) an object (F) vacuum (G) energy (H) heat
[A]: B


[Q]: Fact1: cell division often causes growth, Fact2: Mitosis is cell division., Question: What often causes growth? (A) exercise (B) hormones (C) Atrophy (D) collagen (E) Earthworms (F) Apoptosis (G) Necrosis (H) Mitosis
[A]: H


[Q]: Fact1: pathogens can cause disease, Fact2: Most pathogens are bacteria., Question: what can cause disease? (A) oxygen (B) Pesticides (C) cold temperatures (D) smoking (E) bacteria (F) toxins (G) digestion (H) influenza
[A]:
E