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 light bulb converts electrical energy into light energy when it is turned on, Fact2: Light bulbs are rated in Watts., Question: How is converted energy into light energy rated? (A) energy (B) unique (C) heat (D) good (E) watts (F) parsec (G) kilojoule (H) kinetic energy

Ex Output:
E

Ex Input:
Fact1: webbed feet are used for moving faster through water by aquatic animals, Fact2: Animals move around, seeking their prey., Question: What do webbed feet help aquatic animals do? (A) rapid expansion (B) root growth (C) Catch prey (D) support (E) Regrows it (F) squeeze (G) Relieve pain (H) improve

Ex Output:
C

Ex Input:
Fact1: Most carcinogens cause cancer by producing mutations in DNA., Fact2: Asbestos is a dangerous carcinogen., Question: What causes cancer? (A) the skin (B) smoking (C) Pollution (D) cigarettes (E) Asbestos (F) Eating too much (G) Potatoes (H) buffalo sauce

Ex Output:
E