Answer:
D)The yield to maturity of a callable bond is calculated as if the bond were called at the earliest opportunity.
Step-by-step explanation:
The callable bond should be trade at the less price so it would generate the high return as compared with the non-callable bond. Whenever it is low it generated the high return but it could not increase over and above to the call value at the time when the yield is less. Also prior to the call date the investors expected that the issuer would follow and the price of the bond represent the given strategy
but the yield to maturity should not be measured at the time when the bond can be called
Therefore d option should be considered