Research ethics are general rules that are followed when doing experiments to insure that no permanent harm comes to the test subjects or anybody else as a result of the research. This is perhaps even more important in sociology because the test subjects are human.
Answer: because women are considered "lower" in the older days
Explanation: because females had a lot of bias towards them and they were treated unfairly
Answer: The allies, which included the United States, fought against Nazi Germany and the Pacific War against the Japanese Empire.
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Answer:
Explanation: those above him/ her can not serve
Answer:
freedmen's bureau established schools