The correct response is 300,000 km/s.
According to the principles of relativity, the speed of light in a vacuum is always measured to be the same, regardless of the relative motion of the source or the observer. This means that no matter how fast the car is moving towards the person or what direction it is traveling, the speed of the light emitted from the car's headlights will still be measured as 300,000 km/s by the person, assuming we are not considering any mediums that could affect the speed of light.
Thus, the motion of the car does not affect the speed of light measured by the person.
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