Which firms are more likely to use convertible debt?

Option A. Good firms will use convertibles because the firm’s true value will be made known before the debt is due. Thus by issuing convertibles now, with a call provision, the good firms can issue equity by forcing conversion which will allow the firm to raise more debt if they need it in the future.

To me its Option C, because in order to lower its debt to equities ratio.....

d) all of the above