Detailed 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").
Problem:Fact1: being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time, Fact2: Fens form non-acidic peat., Question: being burried under soil and mud changes how what forms? (A) cacti (B) deltas (C) fens (D) potash (E) bamboo (F) rivers (G) roots (H) mildew
Solution:
C