Final answer:
Revenue for Suniand's Recording Studio should be recognized at the time the recording session is completed, as the service has been provided and the revenue is realizable at that point.
Step-by-step explanation:
When considering when Suniand's Recording Studio should recognize revenue for a two-hour recording session, accounting principles such as the revenue recognition principle should guide the decision. Under the accrual basis of accounting, revenue should be recognized when it is earned and realizable, regardless of when cash is received. In this scenario, the most appropriate time to recognize revenue would be (C) At the time the recording session is completed. This is because the service has been provided, earning the revenue, and it is at this point that the revenue is realizable. Booking the session (A) doesn't ensure service fulfillment, and the beginning of the session (B) doesn't indicate completion. Delivery of the recording (D) can be a separate service and doesn't necessarily denote when the recording session service was completed and earned.