A．They provided evidence that Jefferson's ideal could be achieved.
B．They made farmers less dependent on local banks.
C．They affected the prices that farmers could receive for their crops.
D．They decreased the power of the railroads to control farm prices.

A．They will help listeners acquire more knowledge.
B．They will make other people feel relaxed and comfortable.
C．They must be learned in practice.
D．They can help turn strangers into close friends.

A．They don't want to be considered impolite.
B．They try to show their rich knowledge.
C．They are afraid of being left behind.
D．They want to become more outgoing than before.