Municipal Bonds Can Be Either General Obligation Bonds or Revenue

Municipal bonds can be either general obligation bonds or revenue bonds. Of these two types of municipal bonds, ONLY general obligation bonds

A) are specifically serviced by the income generated from particular projects.
B) are backed by the full faith and credit of the issuer.
C) repay the principal only if a sufficient level of revenue is generated.
D) have the principal and interest guaranteed by a third party.