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[单选题]

Which of the following most accurately describes how to standardize a random variable X?

A.Subtract the mean of Xfrom X,and then divide that result by the standard deviation of X.

B.Subtract the mean of Xfrom X,and then divide that result by the standard deviation of the standard normal distribution.

C.Divide X by the difference between the standard deviation of X and the standard deviation of the standard normal distribution.

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