The last few decades have seen significant changes in the percentage of women's workforce, especially mothers with underage children, most of whom are working full-time. For example, from March 1975 to March through March 2000, the percentage of mothers with children under the age of 18 rose from 47% to 73%. Thus, According to the data of the U.S. Bureau of Labor Statistics in 2007, this percentage is 71%.
The answer is "legitimate purpose".
<span>Among the potential components influencing survey response, three of them are the subject of the survey, who is sponsoring the survey, as seeing some credible source can enhance the respondent's willingness to answer questions, and the survey provider, are the essential determinants.
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(A) They believed black schools weren't equal to white schools, so the schools should be integrated.
This is the correct answer I got. I hope it helps. :)