Need help figuring out the answer

Question 5 (Mandatory) (2 points) Under the accrual method of accounting, when is revenue recognized? O a) When it is earned, no matter when the payment is received. (b) When it is received, as long as the payment is received in the same accounting period. () When it is earned, as long as the payment is received in the same accounting period. O d) When it is received, no matter when it is earned