On May $1$ of Year $1,$ the company paid $$2,400$ cash for rent. This $$2,400$ rental payment covers the period from May $1$ of Year $1$ to April $30$ of Year $2.$ On May $1,$ the cash payment was recorded as an asset, Prepaid Rent. Which ONE of the following would be included in the ADJUSTING journal entry necessary on December $31$ with respect to this prepaid rent?

DEBIT to Rent Expense for $$1,600$

DEBIT to Rent Expense for $$2,400$

CREDIT to Rent Expense for $$2,400$

CREDIT to Rent Expense for $$1,600$