张先生2年前以每股15元的价格买入1000份股票，2年期间，分红两次，分别是0.3、0.2元，当前张先生以每股18元的价格卖出，则持股收益率（）。

A．(A) 16.67%

B．(B) 20.3%

C．(C) 23.3%

D．(D) 26.67%

（）involves comparing actual or planned project practices to those of other projects to generate ideas for improvement and to provide a basis by which to measure performance.These other projects can be within the performing organization or outside of it,and can be within the same or in another application area.

A.Metrics

B.Measurement

C.Benchmarking

D.Baseline