— Linda is a hard – working dancer.

— Yes, when she was in the dancing school, she tried many times to pass her dance test, and __________ she succeeded.

A．by the end

B．at the end

C．in the end

D．on the end

由于标准差或方差指标衡量的是风险的绝对大小，因而不适用于比较不同的预期收益率的投资的风险。