The zscore function of scipy does which of the following?

Answer choices

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From each observation in a column, it subtracts column mean and divides by column standard deviation

From each observation in a column, it subtracts column variance and divides by column mean

From each observation in a column, it subtracts column mean and divides by column variance

From each observation in a column, it subtracts column minimum value and divides by column maximum value