单项选择题

The navigation systems in cars like Lexus, BMW and Audi are mentioned to show ______.

A．the immaturity of the new technology.
B．the superiority of the global positioning system.
C．the cause of price fluctuations in car equipment.
D．the different ways of providing guidance to the driver.

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单项选择题

We learn from the passage that navigation computers ______.

A．will greatly promote sales of automobile.
B．may help solve potential traffic problems.
C．are likely to be accepted by more drivers.
D．will soon be viewed as a symbol of luxury.