Which of the following statements regarding financial ratios is NOT CORRECT? Group of answer choices

A.) Du Pont System enables managers to locate the causes of unsatisfactory ROEs.

b.) Electric utilities generally have high debt ratios because of their more stable revenue streams.

c.) As a ratio for a firm's debt manangement, the equity multiplier beccomes higher with more debt in a firm.

d.) Industry average ratios are good benchmarks to compare performance for all fimrs in the same industry.

e.) Ratio analysis works better for single-business firms than conglomerate frms.