Rental, Inc. received $14,400 from a tenant on December 1 for three months rent of an apartment. This rent was for December, January, and February. If Rental, Inc. debited Cash and credited Unearned Rental Income for $14,400 on December 1, what necessary adjustment would be made on December 31? Select one: A. Unearned Rental Income 4,800 Rental Income 4,800 B. Rental Income 4,800 Unearned Rental Income 4,800 C. Unearned Rental Income 9,600 Rental Income 9,600 D. Rental Income 9,600 Unearned Rental Income 9,600