单项选择题

What is the main topic of the talk

A．Jefferson's views about commercialized agriculture.
B．International trade in the nineteenth century.
C．Improvements in farm machinery in the United States.
D．Farmers' loss of independenc
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单项选择题
According to the professor, what was one result of the increased use of machinery on farms of the United States
A．Prices for farm products rose.
B．Farmers became more dependent on loans from banks.
C．Jefferson established government programs to assist farmers.
D．Farmers relied less on foreign markets.
单项选择题
According to the professor, why was world market important for the United States agriculture
A．They provided evidence that Jefferson's ideal could be achieved.
B．They made farmers less dependent on local bankers.
C．They affected the prices that farmers could receive for their crops.
D．They decreased the power of the railroads to control farm prices.
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