Definition: 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: Mutations may change the structure of a chromosome or just change a single nucleotide., Fact2: Chromosomal abnormalities can be examined by chromosome analysis., Question: Which process of gene abnormalities can mutations be detected? (A) A computer (B) ligt (C) analysis (D) radiation (E) electrically (F) negative (G) Microscope (H) illness
Output:
C