单选题 The scale-free measure of relative dispersion that is useful in making direct comparisons among different asset classes is the:

A、

A. Range.
B、

B. Variation.
C、

C. Coefficient of variation.

【正确答案】 C

【答案解析】The coefficient of variation is the ratio of the standard deviation of a set of observations to their mean value. This scale-free measure permits direct comparisons of dispersion across different data sets.