Answer:
A) A bond's current yield must always be either equal to its yield to maturity or between its yield to maturity and its coupon rate.
Step-by-step explanation:
the yield to maturity = current yield +/- capital gains yield
current yield = yield to maturity +/- capital gains yield
the capital gains yield is positive or negative depending if the bond was sold at a premium or at a discount which results in a coupon rate being either higher or lower than the yield to maturity.
so the current yield must always be within a range between yield to maturity and coupon rate