Which of the following statements regarding unearned revenue is correct?

Select answer from the options below

An adjusting entry for unearned revenue requires a credit to a liability and a debit to revenue.

An adjusting entry for unearned revenue requires a debit to unearned revenue and a credit to revenue.

An adjusting entry for unearned revenue requires a debit to an asset and a credit to revenue.

An adjusting entry for unearned revenue requires a credit to revenue and a debit to an asset.