单项选择题
A cost that has already been paid, or the liability to pay has already been incurred, is a(n): ( ) A. salvage value expense B. net working capital expense C. sunk cost. D. opportunity cost.
A cost that has already been paid, or the liability to pay has already been incurred, is a(n): ( ) A. salvage value expense B. net working capital expense C. sunk cost. D. opportunity cost.