Carolina Truck Lines Purchased a Truck at a Cost of $22,000

Carolina Truck Lines purchased a truck at a cost of $22,000 five years ago.As of January 1 of the current year,depreciation of $18,000 had been recorded on this asset.Depreciation expense for the current year is $2,000.Before the adjustments are recorded and posted at December 31 of the current year,what is the truck's book value?

A) $2,000
B) $4,000
C) $18,000
D) $22,000