A company started the year with $500 of supplies. During the year, the company purchased an additional $1,000 of supplies. There were $900 of supplies on hand at the end of the year. An adjusting entry prepared at the end of the accounting period includes a:

A. debit to Supplies for $900.

B. debit to Supplies for $500.

C.debit to Supplies Expense for $400.

D. debit to Supplies Expense for $600.