单项选择题

在标注样式“公差”上偏差中输入0.015,下偏差中输入0.021,则标注尺寸公差的结果是()

A.上偏差0.015,下偏差0.021
B.上偏差0.015,下偏差-0.021
C.上偏差-0.015,下偏差-0.021
D.上偏差-0.015,下偏差0.021