Which of the Following Statements About Absorption Costing Is True

Which of the following statements about absorption costing is true?

A) As manufacturing output increases, the per-unit manufacturing cost remains constant.
B) As manufacturing output increases, the per-unit manufacturing cost decreases.
C) As manufacturing output increases, the per-unit manufacturing cost increases.
D) As manufacturing output increases, the change in the per-unit manufacturing cost is negated by the change in the per-unit selling cost.