A public school district formally adopted a budget with estimated revenues of $500 and approved expenditures of $490. Which of the following is the appropriate entry to record the budget?
a) Debit Estimated Revenues $500; Credit Appropriations $490; Credit Fund Balance $10.
b) Debit Appropriations $490; Debit Fund Balance $10; Credit Estimated Revenues $500.
c) Debit Encumbrances $490; Debit Fund Balance $10; Credit Estimated Revenues $500.
d) Memorandum entry only.