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: glass cause refraction of light, Fact2: Refraction Refraction is the bending of light rays., Question: Glass causes the _ of light (A) intensification (B) bending (C) photons (D) a wave (E) Pollution (F) blocking (G) heat (H) amplification

Ex Output:
B


Ex Input:
Fact1: an electric stove transforms electrical energy to heat energy, Fact2: Kinetic energy is energy of movement and also includes heat energy and light energy., Question: What transforms electrical energy to kinetic energy? (A) an engine (B) mechanical waves (C) transportation technology (D) Riding a bike (E) Males and females (F) an electric stove (G) a hydraulic system (H) Firecrackers

Ex Output:
F


Ex Input:
Fact1: Blood pH may become unbalanced if the rate of breathing is too fast or too slow., Fact2: Aerobic activities are exercises that cause deep breathing and a fast heart rate., Question: what can cause blood pH to become unbalanced? (A) aerobic activities (B) h2o (C) the sun (D) Heavy rains (E) plasma (F) Dehydration (G) smoking cigarettes (H) cloudy and rainy weather

Ex Output:

A