单选题 Consider the following statements about the geometric and arithmetic means as measures of central tendency. Which statement is least accurate? A. The geometric mean may be used to estimate the average return over a one -period time horizon because it is the average of one - period returns. B. The difference between the geometric mean and the arithmetic mean increases with an increase in variability between period- to- period observations. C. The geometric mean calculates the rate of return that would have to be earned each year to match the actual, cumulative investment performance.