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: All cells use glucose for energy., Question: What do all living things use for energy? (A) fish (B) kids (C) energy (D) glucose (E) The Sun (F) procreation (G) sunlight (H) food

Ex Output:
D

Ex Input:
Fact1: Ozone depletion results in higher levels of UV radiation reaching Earth., Fact2: Birds live on Earth, trees live on Earth., Question: what results in higher levels of uv radiation reaching the place birds and trees live? (A) emissions (B) earthquakes (C) oxidation reaction (D) ozone depletion (E) global warming (F) important habitats (G) fairies (H) the ozone layer strengthening

Ex Output:
D

Ex Input:
Fact1: Behaviors that improve fitness increase through natural selection., Fact2: Natural selection is differential reproduction., Question: Behaviors that improve fitness increase through (A) differential reproduction (B) produce offspring (C) biological diversity (D) metabolic reaction (E) recovery time from fatigue (F) characteristics (G) barks and snarls (H) members of their own species

Ex Output:
A