Which of the Following Statements Is CORRECT

Which of the following statements is CORRECT?

A) An increase in fixed costs, (holding sales and variable costs constant) will reduce the company's degree of operating leverage.
B) If a firm's degree of operating leverage increases, its degree of financial leverage must also have increased.
C) An increase in interest expense will reduce the company's degree of financial leverage.
D) If the company has no debt outstanding, then its degree of total leverage equals its degree of operating leverage.
E) If the company has no debt outstanding, then its degree of total leverage equals its degree of financial leverage.