求大家帮忙看一道prep2012语法题，谢谢~~~~

stellapan95

shilapentokh's study indicated that ,in soviet union ,women's absenteeism from their jobs ,despite their home duties and their child-care responsibilities ,were only a fifth of men .

a)were only a fifth of men
b)were only a fifth of men's
c)was only a fifth of men's
d)was only a fifth of men
e)was a fifth of only of that of men


答案是C。
但是GMAT不是不让用A of B's 这样的双重所有格吗？
还是说这里不是双重所有格？

stellapan95

顶楼主！               

stellapan95

顶楼主！               

stellapan95

顶楼主！               

疯狂的狐狸

the comparison is between women's absenteeism and men's (absenteeism)
Not women's absenteeism and men
of belongs to  “a fifth of"

it's even harmful to just memorize rules without considering the meaning of the sentence