A Deficit Unassigned Fund Balance Was Reported in a City

A deficit unassigned fund balance was reported in a city Capital Projects Fund balance sheet. Which of the following explanations for the deficit is not plausible?

A) The project is being financed in large part by a federal grant, which provides that costs incurred will not be reimbursed until the project is completed.
B) The city financed current year expenditures by issuing bond anticipation notes that are not general long-term liabilities.
C) The city entered into a two-year construction contract. Transfers from the General Fund will be made each year to cover actual expenditures.
D) The city had a large assigned fund balance.