Revolving credit, such as a line of credit, allows customers to borrow funds up to a limit, often with a commitment fee for access, and use them as needed, repaying and borrowing again. Option A (installment credit) involves fixed payments over time, like a car loan. Option C (service credit) is credit for services, like utility bills. Option D (trade credit) is short-term credit between businesses. This question falls under the Accounting and Finance category, focusing on credit types.
Reference:ETS Praxis Business Education: Content Knowledge (5101) Study Companion, Section on Accounting and Finance; Fundamentals of Financial Management, Chapter 16.