311年,西晋都城洛阳被匈奴兵攻破,中原人民纷纷南逃避难。这一事

311年,西晋都城洛阳被匈奴兵攻破,中原人民纷纷南逃避难。这一事件反映了当时北方人民南迁主要是因为

      A.北方自然条件恶劣                                 B.北方战乱频繁

      C.北方统治者残暴                                        D.南方经济发达

答案

B

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