Answer:
B) debenture
Step-by-step explanation:
A bond refers to a debt or fixed investment security, in which a bondholder (creditor or investor) loans an amount of money to the bond issuer (government or corporations) for a specific period of time.
Generally, the bond issuer is expected to return the principal at maturity with an agreed upon interest to the bondholder, which is payable at fixed intervals.
A debenture is an unsecured bond, and most of the bonds sold today in the United States are of this type because it's a long-term security that yields fixed rate of interest.