One Advantage of CoCo Bonds (Contingent Convertible Debt), Over Alternative

One advantage of CoCo bonds (contingent convertible debt) , over alternative methods for recapitalizing banks, is that:

A) the interest rate paid on CoCo bonds would be lower than on bonds without the conversion feature.
B) CoCo bonds provide banks with capital from private rather than taxpayer funds.
C) banks would only have to seek purchasers of CoCo bonds in times of financial stress.
D) obtaining increased bank capital by converting CoCo bonds would increase bank liabilities.