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Significant changes enacted at the national levels included the imposition of an income tax with the Sixteenth Amendment, direct election of Senators with the Seventeenth Amendment, Prohibition with the Eighteenth Amendment, election reforms to stop corruption and fraud, and women's suffrage through the Nineteenth century
Explanation:
Feeling B not quite sure tho
The battle of midway is considered to be the turning point due the fact it was one of the major allied victories.