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: when light enters the eye through the pupil , that light falls on the retina, Fact2: Images are retained on the retina of a viewer's eye for a fraction of a second after they strike it., Question: Where are images retained? (A) Retina (B) RNA (C) calcite (D) an object (E) arteries (F) energy (G) squids (H) segmented

Ex Output:
A

Ex Input:
Fact1: Tunicates reproduce sexually., Fact2: Bulbs are classifies as tunicate or non-tunicate., Question: How many ways can a bulb reproduce? (A) LEDs (B) Two (C) Many (D) wind (E) well (F) 12 (G) bent (H) tube

Ex Output:
B

Ex Input:
Fact1: a plant requires water to grow, Fact2: Bamboos are vigorous, rugged plants., Question: What does bamboo require to grow? (A) Sun (B) protein (C) fibers (D) viruses (E) Light (F) bacteria (G) ice cubes (H) water

Ex Output:
H