第一次国共合作全面破裂，大革命失败的标志是(   )

A．中山舰事件

B．四一二 * *

C．七一五 * *

D．整理党务案

Costs included in the determination of a company’s economic profit that are also most likely to be included in that company’s accounting costs are:（）

A. explicit costs.

B. economic depreciation and foregone interest.

C. opportunity costs associated with labor provided by the company’s owners.