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 Input:
Fact1: Carbon may be stored in sedimentary rock for millions of years., Fact2: Limestone is a type of sedimentary rock., Question: What element can be stored in limestone for millions of years? (A) oxygen (B) Energy (C) matter (D) carbon (E) sodium (F) helium (G) rock salt (H) heat

Ex Output:
D


Ex Input:
Fact1: Some parasites kill their host, but most do not., Fact2: Parasites include lungworms and GI parasites., Question: What can kill their host? (A) cigarettes (B) bacteria (C) adding heat (D) heat or cold (E) burning (F) Dehydration (G) lungworms (H) Pollution

Ex Output:
G


Ex Input:
Fact1: Pneumonia may be caused by an infection or injury of the lungs., Fact2: If fluid builds up within the lung tissue , it is called pneumonia., Question: what might infection or injury of the lungs cause? (A) decrease stamina (B) death and devastation (C) a lot of human deaths (D) stomach (E) destroying life (F) good health (G) h2o vapor (H) lung tissue fluid build up

Ex Output:

H