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: Feathers help birds fly and provide insulation., Fact2: Some birds are flightless birds., Question: Why do the flightless have feathers? (A) layers of fat (B) Sublimation (C) it needs them (D) warm-blooded (E) Air conditioning (F) Radiation (G) Insulation (H) protect them

Ex Output:
G

Ex Input:
Fact1: Flagella help prokaryotes move., Fact2: Flagella and cilia are similar in structure., Question: What helps movement? (A) stamina (B) fur (C) cilia (D) hair (E) kinetic (F) nerves (G) motors (H) elastic

Ex Output:
C

Ex Input:
Fact1: a plant requires sunlight to grow, Fact2: The nature of sunlight Sunlight is electromagnetic energy., Question: What type of energy do plants require to grow? (A) carbon dioxide (B) adding heat (C) hydrogen and oxygen (D) Organic compounds (E) heat energy (F) Converted sugar (G) Electromagnetic (H) organic molecules

Ex Output:
G