On June 1st, 2021, XYZ Hotel accepted a $4,500 payment from ABC Inc. to provide meeting rooms for employees workshops over the next three months. What Adjusting entries are required on June 31st, 2021? Select one: a. Debit Service revenue $1,500; Credit Unearned revenue $1,500 b. Debit Unearned revenue $4,500; Credit Service revenue $4,500 c. Debit Unearned revenue $3,000; Credit Service revenue $3,000 d. Debit Unearned revenue $1,500; Credit Service revenue $1,500