Data are collected about the amount of time, in minutes, each band member spends practicing. How does a single outlier change the lower and upper quartiles of the collected data? A. A single outlier causes the values of the quartiles to move slightly toward each other. B. A single outlier causes the values of the quartiles to move slightly away from the outlier. C. A single outlier doubles the values of the quartiles. D. A single outlier does not affect the values of the quartiles.