Answer:
b) debit accounts receivable, credit capital
Explanation:
Performing service is part of normal business activities. It generates revenue for the business.
Once a service has been performed, revenue increases. Revenue is an equity account (it increases the owner's equity). An increase to an equity account is recorded by crediting the account.
The payment will be received in 30 days. This is an increase in accounts receivables ( asset account). An increase in assets is recorded as a debit.