PREP12-12 Shliapentokh’s study indicated that

[MiaM926]

Shliapentokh’s study indicated that, in the 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 only of that of the men

OA：C
I am okay with OA, but there still remains a problem about the position of "only". (E choice)
I think only is modifying that, i.e., absenteeism, which means that the sentence only compares the absenteeism (not other things such as child-care responsibilities...) , and I think it's okey?
Thx.

[Sage Pearce-Higgins]

Please could you cite the source of this question? I won't answer until you do so.