You will be given a definition of a task first, then some input of the task.
You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Professor Walden studies genetics at a local university. She believes that she has discovered information that contradicts a widely accepted theory. As a scientist and leader in the study of genetics, which action should she take?
(A) Announce to the world that her theory is better than the old theory. (B) Call the news media and tell them about her new theory. (C) Challenge the old theory with scientific evidence. (D) Request that the old theory be banned.
Output:
C