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: Flagella help prokaryotes move., Fact2: Most prokaryotes are unicellular., Question: What helps unicellular organisms move? (A) evaporation (B) bacteria (C) heat energy (D) glucose (E) sweating (F) flagella (G) legs (H) blood

Ex Output:
F


Ex Input:
Fact1: Active immunity results when an immune response to a pathogen produces memory cells., Fact2: Vaccination is Active Acquired Immunity., Question: What results when an immune response to a pathogen produces memory cells? (A) anemia (B) vaccination (C) kill them (D) competition (E) lie detectors (F) rapid expansion (G) killing insects (H) it needs them

Ex Output:
B


Ex Input:
Fact1: Cells are the basic units of the structure and function of living things., Fact2: Osteogenic cell types are indicated., Question: What is a type of the basic units of the structure and function of living things? (A) sensory neurons (B) osteogenic (C) animals (D) Chemical energy (E) Energy (F) trees (G) ferns (H) fur and fat

Ex Output:

B