Which of the following statements is true? Bondholders usually require a higher return on a bond without a sinking fund clause than one with a sinking fund, everything else the same. Bondholders usually require a lower return on a callable bond than a non- callable bond, everything else the same. Bondholders usually required a higher return on a senior bond than a a subordinated bond, everything else the same. Bondholders usually require a higher return on a secured bond than an unsecured bond, everything else the same