Which of the Following Statements Is False

Which of the following statements is false?

A) Investors pay less for bonds with credit risk than they would for an otherwise identical default-free bond.
B) The yield to maturity of a defaultable bond is equal to the expected return of investing in the bond.
C) The risk of default, which is known as the credit risk of the bond, means that the bond's cash flows are not known with certainty.
D) For corporate bonds, the issuer may default-that is, it might not pay back the full amount promised in the bond certificate.