Your management is evaluating a project which requires an investment of $500,000. The expected inflow is $100,000 for 1st year, and $300,000 for every year after that. What is the payback period

A．2 year

B．2 years and 4 month

C．3 year

D．Cannot be determined because discount rate is not specifie

净年值是指把项目寿命期内的净现金流量按设定的折现率折算成与其等值的各年年末的（）。

A.等额净现金流量值

B.净现金流量值

C.差额净现金流量值

D.税后净现金流量值