Q: You are given a science question (hard-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.
A scientist claims that he made a discovery in the lab. What does the scientist need to have in order to prove that the discovery is valid?
(A) diagrams showing the steps used in the discovery (B) accurate records that show that the data are consistent (C) documents showing that the scientist is well known (D) proof that the equipment used in the discovery is of high quality
A:
B