D and b more roads b i assume
Question order bias, or "order effects bias", is a type of response bias where a respondent may react differently to questions based on the order in which questions appear in a survey or interview
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Robert is disgruntled with the current political party in Presidential office. He decides to publicly voice his opinions in the middle of the city square with a speech outlining the faults of the party, the mistakes of the President, and the overall decline of the administration.
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so you see, if there is nothing to balance the equations on then the entire thing will fall apart and you wont be able to solve for a variable