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: cycles of freezing and thawing water cause ice wedging, Fact2: Under the pressure of the innumerable wedges of ice, the rock cracks., Question: What is created from cycles of freezing and thawing water? (A) Something that is on the Moon (B) swamp vegetation (C) Something that cracks rocks (D) sedimentary rocks (E) A transportation fuel (F) fissures of hot, acidic water (G) Something inside the earth (H) Something that flies
Output:
C