Costco Wholesale Corporation collects annual non-refundable membership fees from customers. When should Costco recognize revenue

for these membership fees? A. Pro rata over the customer's actual purchasing pattern B. Evenly over the membership year C. Immediately when cash is received because the fees are nonrefundable D. At the end of the membership year when Costco has discharged its obligation to the customer E. Evenly over the current fiscal year