Co-signer on a loan is used for?

• A. To sign only as a witness.
• B. To reduce the interest rate regardless of payment.
• C. To pay the loan if the primary borrower defaults.
• D. To ensure the loan is kept confidential.

Answer: (C)

A co-signer is someone who shares responsibility for a loan so the lender can be confident the debt will be repaid even if the primary borrower can't. The key idea is that the co-signer agrees to take on the loan obligations if the borrower defaults, which helps the loan get approved and can make it possible for someone with limited credit to borrow.

This role matters because it ties the co-signer’s finances and credit to the loan as well. If the borrower misses payments, the co-signer is expected to pay, and their own credit score can be damaged by late or missing payments. That’s why co-signing is a serious commitment and not something done to gain a lower rate automatically or to keep the loan confidential.

So the best answer reflects the core purpose: the co-signer will pay the loan if the primary borrower defaults.