Instructions: 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").
Input: Fact1: stalactites are formed by deposition, Fact2: Soils are sand, clay, limestone, and organic deposits., Question: Soil, sand, clay and limestone can form what? (A) detritus (B) stalactites (C) swamp vegetation (D) coral reef (E) fossil fuels (F) Sediment (G) aqueous solution (H) growth
Output:
B