Which of the following is least likely to be classified as an opportunity cost()

A. The cash savings related to adopting a new production process.

B. The cash flows generated by an old machine that is to be replaced.

C. The market value of vacant land to be used for a distribution center.

ICD-10第一章某些传染病和寄生虫病的各个类目的分类轴心是（）

A.解剖部位

B.病理

C.临床表现

D.病因

E.以上都不是