Which classification is each?

Classification Item 1. Buildings 2. Copyright 3. Supplies 4. Unearned service revenue 5. Prepaid insurance 6. Common stock 7. Rent payable 8. Accounts receivable 9. Allowance for doubtful accounts 10. Bonds payable Current assets Property, plant, and equipment Intangible assets Current liabilities Long-term liabilities Contributed capital Retained earnings