B- United Nations was formed in 1945 to promote international order
In July 1938, Corrigan piloted the single-engine plane nonstop from California to New York. Although the transcontinental flight was far from unprecedented, Corrigan received national attention simply because the press was amazed that his rattletrap aircraft had survived the journey.
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Your answer is A, Conflict with Native Americans ended.
Louisiana purchase entailed negative consequences for most of the Louisiana population - blacks and Indians - and became one of the causes of acute social contradictions in modern America. In just 30 years, Americans ousted Indians from most of the Mississippi Valley, physically destroying or expelling them from their ancestral lands through fraudulent treaties
