Which of the following is an example of earned accrual-based revenue?

a. A clothing company sells clothing to customers. The clothing will be delivered in the next accounting period

b. A customer pays for photography services in advance of the photography sessions. The sessions will occur in the next accounting fiscal period.

c. The customer receives photography services that had been paid for in a prior accounting fiscal period

d. A clothing company donates slightly defective clothing to a nearby homeless shelter