16% is the answer.
Step-by-step explanation:
The following is used in order to calculate the cost of the retained earnings.
The Calculation of cost of retained earnings by using bond yield plus the risk premium method
= Long term bond yield + the risk premium
The Long term bond yield = 12 percent
The risk premium = 4 percent
Cost of retained earnings = 12 percent plus 4 percent = 16 %
Therefore, the correct option will be with the 16 percent .