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: high pressure systems cause clear weather, Fact2: Weather Clear weather usually means good visibility., Question: what does a high pressure system cause? (A) hyperthyroidism (B) lowered energy cost (C) harmful substances (D) Heart rate (E) good visibility (F) It gets heated up (G) Pollution (H) rainfall

Ex Output:
E


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: refracting sunlight causes sunlight to split into different colors, Fact2: Colors are the Rainbow spectrum., Question: refracting sunlight (A) it can be seen (B) an electron microscope (C) causes rainbows (D) prisms (E) causes photosynthesis (F) oxygenates (G) electromagnetic energy (H) by indirect light

Ex Output:

C