During December Year 10, Nile Co. incurred special insurance costs but did not record these costs until payment was made during Year 11. These insurance costs related to inventory that had been sold by December 31, Year 10. What is the effect of the omission on Nile's accrued liabilities and retained earnings at December 31, Year 10?
Accrued liabilities
Retained earnings
A. No effect No effect
B. No effect Understated
C. Understated Overstated
D. Understated No effect