Teacher: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.
Teacher: Now, understand the problem? Solve this instance: A student collects data about the dates and strengths of historical earthquakes in Nevada. Which of the following would be best for reporting the strengths of these earthquakes over time?
(A) a topographic map (B) a line graph (C) a series of photographs (D) a table of pictographs
Student:
B