Answer:
c. A firm's cost of reinvesting earnings is the rate of return stockholders require on a firm's common stock.
Step-by-step explanation:
Since a company aims for wealth maximization, it is not feasible to distribute all the earnings of the company to its shareholders.
Therefore, the earnings are then reinvested in order to earn more on such reinvestment.
When there is reinvestment the shareholders desire even more return as the earnings are not distributed. Accordingly the cost of reinvestment is the rate of return desired by the common stockholders on their shares.