A county receives $10,000,000 from a private foundation. The foundation requires that the county maintain the principal of this endowment, and income from its investment must be used to maintain county parks. The county reports activities related to this endowment in a permanent fund. During the year, the county invests the $10,000,000, earns investment income of $300,000, and spends $280,000 on park maintenance. At year-end, how does the permanent fund report fund balance?

A. Nonspendable $10,000,000 and restricted $20,000
B. Restricted $10,000,000 and committed $20,000
C. Restricted $10,000,000 and assigned $20,000
D. Nonspendable $10,000,000 and assigned $20,000