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: melting means changing from a solid into a liquid by adding heat energy, Fact2: When a substance melts, it changes phase from a solid to a liquid by the application of heat., Question: What can be done to a solid by adding heat energy? (A) massive damage (B) phasing the bubbles (C) It expands (D) cooling the center (E) Evaporation (F) changing the phase (G) removing the air (H) Water expanding

Ex Output:
F


Ex Input:
Fact1: pollutants have a negative impact on the environment, Fact2: Environment and Health Environment and Health All living things depend on their environment., Question: pollutants have a negative impact on all what (A) tractors (B) circulatory systems (C) near the shoreline (D) living things (E) Electrical energy (F) pavement (G) potholes (H) important habitats

Ex Output:
D


Ex Input:
Fact1: using a gasoline engine requires burning gasoline, Fact2: Gasoline is used in cars, boats, motorcycles, lawn mowers and other engines., Question: What does using a car require? (A) Burning gasoline (B) Burning wood (C) Electrical energy (D) a hydraulic system (E) Driving a boat (F) Burning tires (G) Time and energy (H) hydrogen and oxygen

Ex Output:

A