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: a mirror is used for reflecting light, Fact2: Light seems to travel in rays or beams., Question: what can a mirror be used to reflect? (A) noble gases (B) air particles (C) glass (D) focusing a lens (E) rays or beams (F) photons (G) sun's heat (H) an electron lens

Ex Output:
E

Ex Input:
Fact1: satellites are used to take images from space, Fact2: Images of Earth taken from space., Question: Images of Earth are taken by (A) satellites (B) light (C) Communication (D) millions (E) radar (F) Plate tectonics (G) moving plates (H) lamphreys

Ex Output:
A

Ex Input:
Fact1: Blood is a fluid connective tissue., Fact2: Connective tissue is classed as visco-elastic., Question: A visco-elastic substance in the body is (A) fluid (B) blood (C) fat (D) osculum (E) finger nails (F) smooth (G) bone (H) teeth

Ex Output:
B