og 109 in和for regardless

109.
     Legislation in the Canadian province of Ontario requires of both public and private employers that pay be the same for jobs historically held by women as for jobs requiring comparable skill that are usually held by men.

(A) that pay be the same for jobs historically held by women as for jobs requiring comparable skill that are

(B) that pay for jobs historically held by women should be the same as for a job requiring comparable skills

(C) to pay the same in jobs historically held by women as in jobs of comparable skill that are

(D) to pay the same regardless of whether a job was historically held by women or is one demanding comparable skills(E) to pay as much for jobs historically held by women as for a job demanding comparable skills

Choice A is best. In choice B, should is illogical after requires,
      or at least unnecessary, and so is better omitted; in choices B and E, job does not agree in number with jobs; and in choices B, D, and E, the wording illogically describes the comparable skills rather than the jobs as being “usually held by men.” Choices C, D, and E produce the ungrammatical construction requires of... employers to pay, in which of makes the phrase incorrect.    In C, the use of in rather than for is unidiomatic, and jobs of comparable skill confusedly suggests that the jobs rather than the workers possess the skills.  In D, the phrase beginning regardless... is awkward and wordy in addition to being illogical.

"In C, the use of in rather than for is unidiomatic,"能解释一下为什么用for不用in吗？“
   In D, the phrase beginning regardless... is awkward and wordy in addition to being illogical.”regardless为什么是不好的呢？thx

1) Pay for something是习惯用法. Pay in只有一个用法. 当你付现金时, 可说pay in cash.

2) regardless本身做状语没问题. 注意OG的解释, the phrase [beginning regardless...] is awkward and wordy.  Beginning限定型定语修饰the phrase, 这里就是说the phrase有问题, 不是regardless有问题. 看下phrase: whether a job was historically held by women or is one demanding comparable skills. 比较乱, 我觉得这样整理比较好: regardless of whether a job of comparable skills usually held by women or by men. 当然D的其它错误也很多. 比如: job放在了状语里了, 那pay就没有宾语了, 读者不知道pay什么东西了. Require of sb. to do也不合习惯.