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: An ordinary ice road is therefore severely damaged by cracks induced by the traffic., Question: cycles of freezing and thawing water can cause what? (A) clean county roads (B) exposure to cold (C) severely damaged roads (D) Physical weathering (E) colder weather (F) Metling snow (G) smooth safe roads (H) rough riding
Output:
C