Explanation: Use Process of Elimination on this question. There is no evidence to suggest how many people died from all bubonic plagues in the first millennium, so eliminate (A). The table does not distinguish between urban and rural populations, so (C) does not work. Eliminate (D) because not all plagues are listed, and two of the three deal with the Roman Empire. Choice (B) is the only option consistent with the table, so it is the best answer.