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: Plants use cellulose for their cell walls., Fact2: Basically, fiber is cellulose ., Question: What is made from cell walls? (A) water (B) blood (C) cells (D) sugar (E) a path (F) fiber (G) moss (H) Carbon

Ex Output:
F


Ex Input:
Fact1: pathogens can cause disease, Fact2: Mad Cow disease is a concern., Question: What can cause Mad Cow? (A) Pollution (B) bacteria (C) cows (D) horses (E) illness (F) pathogens (G) influenza (H) chickenpox

Ex Output:
F


Ex Input:
Fact1: a solution is formed by one substance being dissolved in another substance, Fact2: White vinegar is a 5 percent acetic acid solution., Question: What is formed by one substance being dissolved in another substance? (A) patch reefs (B) hydrogen and oxygen (C) organic molecules (D) a hydraulic system (E) calcite (F) white vinegar (G) Calcium carbonate (H) salinity

Ex Output:

F