Which of the following is an example of a product that uses revolving lines of credit?

Revolving lines of credit are financial products that allow borrowers to access funds up to a certain limit and repay those funds over time, with the flexibility to borrow again without reapplying. Credit cards are a prime example of this type of product. They provide users with a specific credit limit, and as the user pays off their balance, they can borrow again up to that limit. This cycle of borrowing, repaying, and borrowing again exemplifies the revolving nature of credit.

In contrast, products like auto loans, home mortgages, and personal loans typically operate on fixed loan terms where the borrower receives a lump sum of money that must be repaid over a predetermined period with a fixed payment schedule. Once these loans are repaid, the borrower cannot access the funds again without going through a new borrowing process. Thus, they do not function as revolving lines of credit.