投资决策中采用 作为评价投资项目经济效益的基础。( )

A．利润

B．现金流量

C．企业收入

D．现金流入减去现金流出

In a traditionally drawn decision tree, a circle represents （）.

A．a chance to which no estimated monetary value can be assigned so that a likely pay-off can not be shown

B．a decision to which no estimated monetary value can be assigned so that a likely pay-off can not be shown

C．a chance to which an estimated monetary value may be assigned to calculate the most likely pay-off

D．a decision to which an estimated monetary value may be assigned to calculate the most likely pay-off