单选题：Which of the safety developments is NOT mentioned in the pas

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题目内容：
Which of the safety developments is NOT mentioned in the passage? A．Radars that can help drivers to see obstacles in fog.
B．Devices that can help drivers to see through big vehicles.
C．Improvements in seat belts, pedal controls and tyres.
D．Windscreens that can help drivers to improve their vision.

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