Which one of the following statements is CORRECT? a. The price of a stock is the present value of all expected future dividends, discounted at the dividend growth rate. b. Two firms with the same expected dividend and growth rate must also have the same stock price. c. It is appropriate to use the constant growth model to estimate a stock's value even if its growth rate is never expected to become constant. d. The constant growth model takes into consideration the capital gains investors expect to earn on a stock. e. If a stock has a required rate of return is =12%, and if its dividend is expected to grow at a constant rate of 5%, this implies that the stocks dividend yield is also 5%