Which of the following are true? Select one: O The account PREPAID EXPENSE is an expense and the account UNEARNED REVENUE is a revenue The account PREPAID EXPENSE is an asset and the account UNEARNED REVENUE is a liability The account PREPAID EXPENSE is an expense and the account UNEARNED REVENUE is a liability O The account PREPAID EXPENSE is an asset and the account UNEARNED REVENUE is a revenue