Williams Enterprises prepaid four months of office rent totaling $2400 on October 1, 2019. what would be the adjusting entry on December 31, 2019? O Debit Rent Expense and credit Cash for $8400 O Debit Prepaid Rent and credit Cash for $2400 O Debit Cash and credit Unearned Rent for $8400 O Debit Rent Expense and credit Prepaid Rent for $1800