The answer is option D "Republican Party." Because of the fight over slavery as a result of it was the <span>Republican Party. There are two parties that are in battle with each other the democrats and the republicans both have there separate views on the government and how to government should be.
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To ensure that experimenter bias and research participant bias do not influence the results, Margaret should design a set of double-blind experiments.
<h3>What is research?</h3>
Research can be defined as the data or information collected by a researcher so as to draw or reach a conclusion.
Based on the information given she should design a set of double-blind experiments as the method will help to prevent any form of bias in her research results.
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