When 25 comma 000 units are produced, variable costs are $ 13.00 per unit. Therefore, when 20 comma 000 units are produced ________.

A.

variable unit costs will decrease to $ 10.40 per unit

B.

variable unit costs will increase to $ 16.25 per unit

C.

variable costs will remain at $ 13.00 per unit

D.

variable costs will total $ 325 comma 000