Which of the Following Transactions Is Represented by the Diagram

Which of the following transactions is represented by the diagram below?

A) a lumber yard where customers may pay with cash for all purchases
B) a buy-here-pay-here auto dealer where a car buyer sends monthly cash payments to the dealer
C) a consulting firm that offers a variety of consulting services to other businesses
D) a department store that allows customers to carry a balance and to make installment payments, if they choose