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: natural disasters can cause animals to leave an environment, Fact2: And like fire, flooding is a common and widespread natural disaster., Question: What can cause animals to leave their environment? (A) predators (B) rainfall (C) space travel (D) flooding (E) drought (F) mines (G) wind (H) weather

Ex Output:
D


Ex Input:
Fact1: Some parasites live on the surface of their host., Fact2: Leeches are external parasites., Question: What unwanted creature would be found on the surface of a human body using it as a host?  (A) Tapeworm. (B) Leeches. (C) Pesticides (D) animals (E) insects (F) Hookworm (G) bacteria (H) Bracelet.

Ex Output:
B


Ex Input:
Fact1: a thermometer is used to measure temperature, Fact2: Heat and temperature are the same., Question: What can measure heat? (A) chemical messengers (B) a barometer (C) hormones (D) a scale (E) a french scientist (F) lamphreys (G) a thermometer (H) heat

Ex Output:

G