Answer:
The correct answer is D.
Explanation:
A confounding variable is a variable that you didn’t account for. It is when an experimenter cannot tell the difference between the effects of different factors on a variable. This method is used to influence the outcome of experimental design.
As has been the case historically, the most densely populated parts of the United States are east of the Mississippi River. Rings of decreasing population density radiate out from the major urban centers of New York, Philadelphia, and Washington along the East Coast.
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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