Answer: a. reinstates the customer's account to the balance of both gross receivables and the allowance.
Explanation:
When a company receives payment from a customer whose debt had been written off, the first step is to reinstate the account. This will be done by debiting the Accounts Receivable account and crediting the Allowance for doubtful debt accounts.
The accounts receivable account will then be credited to show that it is reducing. The cash account will be debited to show that cash was received from the customer.