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: Genes that are located on the same chromosome are called linked genes., Fact2: Linked genes are inherited together., Question: Genes are inherited together if they are located on the same what? (A) the eyes (B) chromosome (C) cell (D) gene (E) pollen (F) sensory neurons (G) DNA (H) Most plants

Ex Output:
B

Ex Input:
Fact1: erosion of soil has a negative impact on the environment, Fact2: Weathering and erosion continue to shape it today., Question: What has a negative impact on the environment? (A) harmful substances (B) weathering of soil (C) saving water (D) planting trees (E) deforestation (F) massive damage (G) recycling (H) enormous damage to homes

Ex Output:
B

Ex Input:
Fact1: Sponges are filter feeders., Fact2: Since mussels are filter-feeders, they clean water as they feed., Question: What do sponges clean? (A) reefs (B) trees (C) aquatic (D) matter (E) dirt (F) retina (G) snails (H) water

Ex Output:
H