Answer:
The answer is C.
Step-by-step explanation:
Moody's bond ratings are based on financial strength of the issuer i.e its ability to pay a bond's principal and interest as and when due.
Moody's rating scale are as follows: Aaa, Aa, A, Baa, Ba, B, Caa, Ca, C.
The best rating is Aaa which is similar to Standard and Poor's, AAA.
These ratings help to know the issuer (corporation, nations etc.) that are worthy to be given bonds.