Definition: 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.
Input: Leslie's science teacher told her she must take a flexible approach to solving problems. What did Leslie's teacher most likely mean?
(A) Leslie should not follow the experimental instructions exactly. (B) Leslie should only write down lab results that seem to be correct. (C) Leslie should accept all scientific theories even if they have been proven wrong. (D) Leslie should be willing to consider many possible causes for her observations.
Output:
D