The lack of antifreeze in the coolant does not cause an increase in fuel consumption, it is added to prevent the coolant from freezing in winter.
If the steering system is manual, it means that it does not include other electrical or hydraulic mechanisms, it has no impact on fuel consumption.
The electrical devices powered by the generator of the motor vehicle (by the alternator) increase fuel consumption. The alternator is the main component of the electric current generation system of the automobile.
The correct answer is: C
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