Which of the following statements concerning preferred stock is most correct? Select one: a. Preferred stock is valued the same as zero coupon bonds because the cash flow patterns are similar. b. Preferred stock dividends are typically the same each year, allowing a preferred stock to be valued as a perpetuity. c. Preferred stock dividends are calculated as a percentage of common stock dividends, although the preferred stock dividends must be paid first. O d. If a corporation issues 4% preferred stock with a par value of $100, the dividend will increase by 4% per year