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【单选题】
甲、对同一样品进行分析，结果甲为：2.9、2.9、3.0、3.1、3.1;：2.8、3.0、3.0、3.0、3.2，则甲、测定结果的平均偏差是( )。
A.
d甲=0.07,d乙=0.08
B.
d甲=0.08,d乙=0.08
C.
d甲=0.07,d乙=0.07
D.
d甲=0.08,d乙=0.07
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