All of the Following Statements Are Correct Except

All of the following statements are correct except:

A) A firm's business risk is measured by its variability in EPS over time and is affected by several factors,including the business cycle,competitive pressures,and the firm's operating leverage or its level of fixed operating costs.
B) The degree of financial leverage measures the sensitivity of earnings per share to changes in interest expense.
C) The degree of combined leverage is the percentage change in gross profit that results from a 1 percent change in sales volume.
D) The degree of combined leverage is simply the product of its degree of operating leverage and its retention rate.
E) None of the above statements are correct.