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: Air pollution harms the respiratory and circulatory systems., Fact2: Cars are a significant source of air pollution., Question: What harms the respiratory and circulatory systems? (A) oil (B) rain (C) sulfur (D) cars (E) tires (F) coal (G) tar (H) bicycles

Ex Output:
D


Ex Input:
Fact1: if an organism becomes too hot then that organism may die, Fact2: Dehydration in the hot sun is a constant danger., Question: What can happen if an organism is dehydrated? (A) it burns (B) thirst (C) anemia (D) it floats (E) it dies (F) drying out (G) Rise (H) it thrives

Ex Output:
E


Ex Input:
Fact1: Carbon may be stored in sedimentary rock for millions of years., Fact2: Marble is considered a carbonate rock ., Question: Carbon may be stored in what for years? (A) marble (B) peat (C) black holes (D) coal (E) bricks (F) wetland (G) dogs (H) fossils

Ex Output:

A