If a z-score is zero, which of the following must be true? Explain your reasoning. The mean is zero. • The corresponding x-value is zero. • The corresponding x-value is equal to the mean. Choose the correct answer below. O A. The corresponding x-value is equal to the mean, because the z-score is equal to the difference between the x-value and the mean, divided by the standard deviation. O B. The corresponding x-value is zero, because the z-score is equal to the x-value divided by the standard deviation. O C. The mean is zero, because the mean is always equal to the z-score.

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