If all the data values in a population are converted to? z-scores, the distribution of? z-scores will have what? mean? Choose the correct answer below. A. The mean of the? z-scores will be zero. B. The mean of the? z-scores cannot be determined. C. The mean of the? z-scores will be one. D. The mean of the? z-scores will be the same as the mean of the original distribution of data.