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: 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: a glacier causes mechanical weathering, Fact2: Largest of the glacier-formed lakes is Karakul., Question: What can be formed by mechanical weathering? (A) NaCl (B) white (C) rock (D) tube (E) soils (F) Roads (G) Lakes (H) sand

Ex Output:
G

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