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: Cells are the basic units of the structure and function of living things., Fact2: Tigers are the largest of the living cats., Question: Cells are the basic units of the structure and function of what? (A) water (B) mammals (C) ice (D) tigers (E) animals (F) humans (G) plants (H) the Sun

Ex Output:
D

Ex Input:
Fact1: DNA contains genetic instructions for proteins, and RNA helps assemble the proteins., Fact2: DNA is the genetic material responsible for heredity., Question: The genetic material responsible for heredity contains what? (A) wavelengths and photons (B) instructions for proteins (C) characteristics (D) pre-assembled proteins (E) organelles (F) Chemical energy (G) A compound that donates proton (H) blood

Ex Output:
B

Ex Input:
Fact1: using a gasoline engine requires burning gasoline, Fact2: Oil and gasoline are fossil fuels., Question: Fossil fuels are burned in many what? (A) roads (B) Fuel cells (C) solids (D) fossilized animals (E) power (F) engines (G) energy (H) Electrical

Ex Output:
F