Which of the Following Is Not Correct Regarding Preferred Stock

Which of the following is not correct regarding preferred stock?

A) Preferred stocks are considered to be safer investments than common stocks.
B) Owners of preferred stock have first claim to a corporation's assets after creditors in a bankruptcy.
C) Owners of preferred stock receive cash dividends before common stockholders receive their dividends.
D) The dollar amount of the dividend on preferred stock is known before the stock is purchased.
E) The yield on preferred stocks is often lower than the yield on corporate bonds.