GMAT Sentence Correction (SC) | Re: A borrower who cannot qualify for prime financing with a poor credit s

A borrower who cannot qualify for prime financing with a poor credit score should avoid sub-prime loans and instead work on rebuilding their credit.
A. A borrower who cannot qualify for prime financing with a poor credit score should avoid subprime loans and instead work on rebuilding their credit
B. A borrower with a poor credit score who cannot qualify for prime financing should avoid subprime loans and instead work to rebuild his credit
C. A borrower with a poor credit score should work on