Final answer:
Under the accrual basis of accounting, the entry to record the cash received for the sale of three-year subscriptions in January 2020 would include a credit to Deferred subscription revenue for $15,000.
Step-by-step explanation:
Under the accrual basis of accounting, the entry to record the cash received for the sale of three-year subscriptions in January 2020 would include a credit to Deferred subscription revenue for $15,000. This is because the revenue has not yet been earned and should be recognized over the three-year subscription period. The cash received is considered a liability until the revenue is earned.