Which of the following conclusions about imperial treatment of “barbarian” (foreign) peoples in the period 600 (B) (C) E. to 600 (C) E. is most directly supported by the passage?

(A) Empires encouraged rival tribes to destroy one another to reduce threats to the state. (B) Empires welcomed migrations of barbarian peoples as sources of military manpower or economic productivity. (C) Empires used military force against all neighboring barbarian peoples as a means of expanding their influence. (D) Empires used religion to convert barbarian peoples so that they might become friendlier to the state.Explanation: The passage discusses tribes destroying each other for the benefit of Rome. Eliminate (B), (C), and (D), as they are not supported by the passage.