What is the effect of keeping an appropriate gap from the vehicle in front of you while driving on fuel consumption and the wear of the vehicle?

1. AKeeping an appropriate gap from the vehicle in front of you involves constant use of the brakes, and thus rapid brake wear is caused.
2. BThe smaller the gap from the vehicle in front, the less the brake wear and the lower the fuel consumption.
3. CKeeping an appropriate gap is necessary only for preventing accidents, and has no effect on vehicle wear or on fuel consumption.
4. DKeeping an appropriate gap reduces brake wear and reduces the engine's fuel consumption.

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