Answer:Required design changes after the Three Mile Island accident resulted in higher costs and longer construction times for new nuclear plants. As a result, construction of nuclear reactors steeply declined. No nuclear plants started after 1974 have been completed in the United States.
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The agreement was the unanticipated fruit of an attempt by the French Foreign Minister, Aristide Briand, to negotiate a bilateral treaty with the United States in which each nation would renounce the use of war as an instrument of policy toward the other.
Assortment means there are many variations/types of an object or objects.
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A historian would first look at the reliability of a source - when it was published and what was happening at the time (context), who wrote it and their qualifications, any bias the author may hold, whether author sources corroborate the source, whether the author has used references, whether the source provides evidence, who the source is representative of and whether the source provides a balanced perspective