Instructions: 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").
Input: Fact1: Blood type is important for medical reasons., Fact2: Each of the four blood types, O, A, B and AB play an important role in patient care., Question: What would be important to know for medical reasons (A) You are under 6' tall (B) measure of motion (C) You have brown eyes (D) You are type O (E) tooth enamel (F) coliform (G) You have blond hair (H) a barometer
Output:
D