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: Annelids are worms such as the familiar earthworm., Fact2: An earthworm has five hearts., Question: One example of an annelid has how many hearts? (A) three (B) Five (C) white (D) warm (E) four (F) strong (G) long (H) small

Ex Output:
B


Ex Input:
Fact1: a light bulb is used for seeing in the dark, Fact2: Light is emitted by a light bulb., Question: What is required for seeing? (A) dark (B) sun (C) light (D) wind (E) retina (F) eyes (G) photons (H) copper

Ex Output:
C


Ex Input:
Fact1: Rivers are usually larger than streams., Fact2: Watersheds are creeks, streams and rivers., Question: what are rivers? (A) dangerous (B) storing water (C) watershed (D) kalenchoes (E) they bend (F) rainy (G) kinetic (H) strong

Ex Output:

C