less of a commitment是个什么用法？
There is a widespread blief in the united states and western Europe that young people have [a small commitment to work and a carrer than their parents and grandparents] and that the source of the change lies in the collaps of the work ethic
a) a small commitment to work and a carrer than their parents and grandparents
b) less of a commitment to work and a carrer than their parents and grandparents
c) a small commitment to work and a carrer than that of their parents and grandparents
d) less of a commitment to work and a career than their parents and grandparents had
e）a lessening of the commitment to work and a career than their parents and grandparents had
想知道less of a commitment是个什么用法？以前没有看到过，羞愧：（
谢谢大牛！ | 
