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A．Europe was changing more quickly than the United States.B．Europe had greater need of farm machinery than the United States.C．The United States was finally running out of good farmland.D．There was a shortage of workers on the United States farms.
A．Europe was changing more quickly than the United States.
B．Europe had greater need of farm machinery than the United States.
C．The United States was finally running out of good farmland.
D．There was a shortage of workers on the United States farms.
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