单项选择题

A．the demand is too low
B．the supply is too large
C．the cost is too high
D．the price is changeable
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单项选择题
The author argues that ______.
A．crime decreases are not to be taken seriously
B．minor cases should also be registered
C．administrative changes should be made to curb crime
D．monetary level is an important criterion for judging crime
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