Answer:
The question is incomplete, the options are as follows:
(a). When interest rates are lower than they were when bonds were issued.
(b). When interest rates are higher than they were when bonds were issued.
Step-by-step explanation:
Whenever the rates fall, it does not make logical sense for the bond or securities issuer to continue charging investors higher-than-average interest because a clause and provision in the bond encourages withdrawal or redemption before maturity.
There the correct answer is (a).