不明白OG13的一道阅读题，求敲醒！！！

lylblue

(1)In the seventeenth-century Florentine textile
industry, women were employed primarily in lowpaying,
low-skill jobs. To explain this segregation
of labor by gender, economists have relied on
(5) the useful theory of human capital. According
to this theory, investment in human capital—the
acquisition of difficult job-related skills—generally
benefits individuals by making them eligible to
engage in well-paid occupations. Women's role as
(10) child bearers, however, results in interruptions in
their participation in the job market (as compared
with men's) and thus reduces their opportunities
to acquire training for highly skilled work. In
addition, the human capital theory explains why
(15) there was a high concentration of women workers
in certain low-skill jobs, such as weaving, but not
in others, such as combing or carding, by positing
that because of their primary responsibility in child
rearing women took occupations that could be
(20) carried out in the home.

There were, however, differences in pay scales
that cannot be explained by the human capital
theory. For example, male construction workers
were paid significantly higher wages than female
(25) taffeta weavers. The wage difference between
these two low-skill occupations stems from the
segregation of labor by gender: because a limited
number of occupations were open to women, there
was a large supply of workers in their fields, and
(30) this "overcrowding" resulted in women receiving
lower wages and men receiving higher wages.


题目是这样的~
44. The author of the passage would be most likely to
describe the explanation provided by the human
capital theory for the high concentration of women in
certain occupations in the seventeenth-century
Florentine textile industry as
(A) well founded though incomplete
(B) difficult to articulate
(C) plausible but poorly substantiated
(D) seriously flawed.
(E) contrary to recent research
答案选A。
答案是A证明这道题应该定位全文。但是我认为应该定位第一段，因为第二段都是讲的“wage difference不能被theory of human capital解释”的问题，只有第一段提到了"high concentration of woman in certain occupations"的问题；而且更为确切的，我认为应该定位第一段末句。所以，我选的C，即可行但没有强有力的证据支持。
所以。。。各位CDer，我是哪里理解错了~？求敲醒！！！