题目内容：
According to the first paragraph of the passage, the author considers which of the following to be most help- ful in determining the value of special protective labor legislation for women?
A．A compartive study of patterns of work-related illnesses in states that had such laws and in states thatdid not. B．An estimate of how many women workers are in favor of such laws.
C．An analysis of the cost to employers of complying with such laws.
D．An examination of the actual effects that such laws have had in the past on womenworkers.
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答案解析：