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: Consider 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

Output: H


Input: Consider Input: Fact1: Birds evolved from a group of bipedal dinosaurs called theropods., Fact2: All hawks are birds., Question: What evolved from a group of bipedal dinosaurs called theropods? (A) alpacas (B) bacteria (C) hawks (D) vision (E) humans (F) animals (G) mammals (H) viruses

Output: C


Input: Consider Input: Fact1: when the seasons change from the summer to the fall , the amount of daylight will decrease, Fact2: Seasons are caused by the tilt of the earth's axis., Question: What determines the amount of daylight earth gets?  (A) Heat energy (B) The darkness it gets (C) The bending of a ray of light (D) The tilt of the axis (E) The tilt of the sun's axis (F) electromagnetic energy (G) The brightness of the earth (H) rain or sun shine


Output: D