Which Statement Regarding Bonds Is True

Which statement regarding bonds is true?

A) The total yield on a bond is derived from dividends plus changes in the price of the bond.
B) Bonds are riskier than common stocks and therefore have higher required returns.
C) Bonds issued by larger companies always have lower yields to maturity (less risk) than bonds issued by smaller companies.
D) The market value of a bond will always approach its par value as its maturity date approaches, provided the bond's required return remains constant.