B:
Agriculture, water projects, shipyards all offered steady work to people driven out of the plains states.
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Presidents Theodore Roosevelt<span>, 1901–09 (left), </span>William Howard Taft<span>, 1909–13 (center), and </span>Woodrow Wilson<span>, 1913–21 (right) were the main Progressive presidents; their administrations saw intense social and political change in American society.</span>
Alfred Wegener argued about the idea of continental drift in the early period of the 20th Century.
<h3>Who was Alfred Wegener?</h3>
Alfred Wegener was the geologist who discovered the theory of continental drift which had occurred on Earth about three hundred million years back.
Alfred Wegener identified that there was a supercontinent named Pangaea which was split and moved from its places being one of the similarities between the coastlines of the western part of Africa and the eastern part of South America.
Therefore, continental drift was one of the concepts beings argued by Alfred Wegener in the twentieth century.
Learn more about the Alfred Wegener in the related link:
brainly.com/question/798637
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