Question on fixed income income

brk1yn

Here is a question that I have NO idea which would be right. These are the type of conceptual questions that give me problems, and it worries me that I am completely guessing on these..would anyone here know the right answer or how to deduce it and enlighten me?

- Which of the fllowing statements about the risks associated with investing in bonds is MOST accurate ?

A. Corporate debentures are not subject to prepayment risk
B. Liquidity risk is not relevant if the portfolio manager intends to hold the bond to maturity
C.Event risk refers tot he possibility that the issuer breaches one of its debt covenants and triggers a "credit event"

Am I screwed not knowing this? These frustrate me so...