You are asked to calculate the mean of a variable with some values equal to zero. You have the choice to treat the zero entries as true valid entries as true valid values or as false missing values. Which of the below statements is correct? A. The mean with zero values treated as true zeros will be higher than the mean with zero values treated as missing values. B. The mean with zero values treated as true zeros will be lower than the mean with zero values treated as missing values. C. No difference between the two means D. Not enough information to tell