单项选择题

对于数据标准化,请将数列50,32,7,25,18,进行归一化处理,其结果是:()

A.0.82,0.43,0.01,0.33.0.23
B.1,0.23,-1,-0.15,-0.24
c1,0.58,0,0.42,0.26
d1,0.5,-1,0.1,0.15