During the month of August a client asked you to invoice their recurring monthly invoices for August through December as they were in need of cash. How should this be handled for the business in accordance to GAAP? 

a. Invoice each customer all on one invoice with the invoice date of August; recognizing 5 months of revenue on the date of the invoice.

b. Invoice each customer with individual invoices for each month of service all dated in August; recognizing the revenue on the date of the invoice

c. Invoice each customer all on one invoice with the invoice date of August; recognizing the revenue in each month services are rendered 

d. Invoice each customer with individual invoices for each month of service with individual invoices pre-dating them for the month of intended service