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: Viruses are so small that they can be seen only with an electron microscope., Fact2: Electron microscope is developed in Germany., Question: viruses are so small that they can be seen only with a device developed where? (A) A computer (B) sunlight (C) Light (D) germany (E) retina (F) at home (G) canada (H) taiwan

Ex Output:
D


Ex Input:
Fact1: Reproduction is the process by which organisms give rise to offspring., Fact2: Then, the lowest energy offspring are used as parents for the next generation., Question: The next generation of an organism rises via: (A) Plants growth (B) spontaneous generation (C) reproduction (D) The Sun (E) revolution (F) sun's heat (G) heat energy (H) unions

Ex Output:
C


Ex Input:
Fact1: Cells are the basic units of the structure and function of living things., Fact2: An organism is a living thing., Question: Cells are the basic units of the structure and function of what? (A) animals (B) Most plants (C) humans (D) organisms (E) cell walls (F) rock (G) cell membranes (H) mammals

Ex Output:

D