Which of the following would increase the required return on the stock of a firm for a given level of the promised payment to debtholders? (In evaluating each item, assume all other factors are held constant.) a decrease in the volatility of a firm's future cash flows an increase in the sensitivity of a firm's future cash flows to market and macroeconomic fluctuations a decrease in the financial risk of a firm an increase in the expected level of free cash flow in each future period