A convertible bond can be thought of as partially a straight bond and partially equity.With this in mind, which of the following two securities is likely to provide the higher return:

(a)A straight bond or a convertible bond in the event that interest rates fall

(b)A straight bond or a convertible bond in the event that the idiosyncratic risk of a firm's stock increases

(c)A stock or a convertible bond in the event that a firm increases its dividend payments

I would appreciate an explanation for each. Thank you!