An increase in which of the following will increase the return on equity, all else constant?
I. Total asset turnover.
II. Net income.
III. Total assets.
IV. Debt-equity ratio.
-I only.
-I and II only.
-I, II, and IV only.
-I, II, and III only.
-I, II, III, and IV.
Answer: I, II, and IV only