Which of the following is true.

a. Preferred stockholder have a right to vote for US presidents while the common stockholder do not

b. We use the present value of an annuity to solve for the price of a stock whose dividends are expected to vary

c. Ceteris paribus, acc. tp CAPM, higher the market risk premium would result in lower stock price

d. As an investor, you would buy a stock at the Buy price and sell at Ask price