Which of the following statements is true? Select one: a. Preferred shareholders receive a guaranteed fixed dividend payment for ever but are offered no voting rights b. Corporate bonds are less risky compared to common shares and the returns on bonds are higher compared to stock returns. c. Money market instruments are less liquid than capital market instruments because they have shorter life cycle, usually less than one year. d. Treasury bills mature after more than one year and are risky assets because they are not guaranteed to be profitable