A historian has discovered a document written by an ancient civilization that contains a long list of names. Next to each name is a range of dates. The first date listed next to a name is always the same as the last date listed next to the name just below it. The historian uses this information to conclude that it is a list of the civilization's most powerful political leaders. Which of the following statements best describes the tactic the historian used to make his conclusion? A. The historian created a summary. B. The historian made an inference. C. The historian created a generality. D. The historian made a prediction.