Final answer:
A claim against a customer for goods or services sold on credit is known as an account receivable, which is an asset to the company.
Step-by-step explanation:
A claim against a customer for goods or services that have been sold or provided on credit is known as an account receivable. This is essentially the money owed to a business by its customers for sales made on credit. An account receivable is considered an asset for the company since it is money that is expected to be received.
On the other hand, an account payable is an obligation of a company to pay a supplier for goods or services received. This is classified as a liability on the company's balance sheet. An expense refers to the outflow of funds representing the cost of operations or goods consumed in generating revenue, and it is recorded on the income statement, rather than on the balance sheet like accounts receivable and payable.
Therefore, the correct answer to the question is A. an account receivable.