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: if all members of a species cannot produce offspring then that species will likely become extinct, Fact2: Avian species are less likely to become extinct if they are common across large ranges., Question: Avian species are less likely to end up extinct if they what? (A) single-celled organisms (B) important habitats (C) abandon habitats (D) stop reproducing (E) animals with backbones (F) produce offspring (G) population movement (H) destroy offspring

Ex Output:
F

Ex Input:
Fact1: Differentiation is the process by which unspecialized cells become specialized., Fact2: T helper cells differentiate to Memory cells and effector cells., Question: memory cells and effector cells are what compared to T helper cells (A) dermal & vascular tissue (B) antibodies (C) fetal development (D) antigens (E) occurs over a wide range (F) prokaryotic cells (G) unicellular organisms (H) more specialized

Ex Output:
H

Ex Input:
Fact1: Digestion is the process of breaking down food into components the body can absorb., Fact2: Digestive enzymes are necessary for a complete digestion., Question: What causes food to break down? (A) Blood (B) bacteria (C) Enzymes (D) Saliva (E) sodium (F) heat (G) Esophogus (H) Acids

Ex Output:
C