题目内容：
We can infer from the sentence“ Later, the policy of killing Indians or... contradicted with their widespread employment as slaves” that__________.
A．[ A ] many Indians were killed by White settlers B．[ B ] many Indians were drove away from white settlements
C．[ C ] the Indians were slaves in a wide-spread way
D．[ D ] white settlers must have to find other source of labor
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答案解析：