During the nineteenth century, occupational information about women that was provided by the United States census-a population count conducted each decade-became more detailed and precise in response to social changes. Through 1840, simple enumeration by household mirrored a home-based agricultural economy and hierarchical social order: the head of the household (presumed male or absent) was specified by name, whereas other household members were only indicated by the total number of persons counted in various categories, including occupational categories. Like farms, most enterprises were family-run, so that the census measured economic activity as an attribute of the entire household, rather than of individuals.
The 1850 census, partly responding to antislavery and women's rights movements, initiated the collection of specific information about each individual in a household. Not until 1870 was occupational information analyzed by gender: the census superintendent reported 1.8 million women employed outside the home in "gainful and reputable occupations." In addition, he arbitrarily attributed to each family one woman "keeping house." Overlap between the two groups was not calculated until 1890, when the rapid entry of women into the paid labor force and social issues arising from industrialization were causing women's advocates and women statisticians to press for more thorough and accurate accounting of women's occupations and wages.
Each of the following aspects of nineteenth-century United States censuses is mentioned in the passage EXCEPT the
year in which data on occupations began to be analyzed by gender
year in which specific information began to be collected on individuals in addition to the head of the household
year in which overlap between women employed outside the home and women keeping house was first calculated
way in which the 1890 census measured women's income levels and educational backgrounds
way in which household members were counted in the 1840 census
A选项：职业数据开始被按性别来分析的年份。原文第二段找到此句“Not until 1870 was occupational information analyzed by gender:”。
B选项：除掉每个家庭的首脑的具体信息外开始编写每个人的具体信息的年份。原文第二段第一句“The 1850 census initiated the collection of specific information about each individual in a household. ”。
C选项：第一次计算两类人（在家的女人和在外工作的女人）重叠部分信息的年份。因为“census superintendent”是任意指定的一名在家的女人，所以很有可能这个女人其实是在外工作的，所以这两类人有重叠部分。原文第二段找到此句“Overlap between the two groups was not calculated until 1890”。（PS. 感谢的抓抓友情提醒，overlap属于抽象动词，往往作为”可能考点”出现, 阅读时应该注意此类词。）
E选项：1840年的普查计算家庭成员的方法。原文第一段第二句解释了计算的方法（simple enumeration）。第三句还有个例子。（ps. glhelr友情提醒，Gmat语法中举例时不可以用“like”喔~）