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: fossils are formed when layers of sediment cover the remains of organisms over time, Fact2: Plants and animals are organisms., Question: What forms when plants are covered in layers of sediment over time? (A) Conifers (B) watershred (C) fossils (D) H2O (E) Echinoids (F) bubbles (G) loose soil (H) bones

Ex Output:
C


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: phase changes do not change mass, Fact2: Melting is a phase change., Question: What happening to something will not change its mass? (A) growing (B) Dilution (C) energy (D) doubling (E) melting (F) It expands (G) Energy. (H) shrinking

Ex Output:

E