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Which of these statements are true? The speed of light is approximately 299,792,458 m/s and is...

Which of these statements are true?

The speed of light is approximately 299,792,458 m/s and is uncertain to about 1 m/s

The speed of light is the same seen by any observer anywhere in the universe

If you are driving along at 100 km/hr, the light leaving your headlights is moving away from your car at 100 km/hr (0.0277 km/s) plus the speed of light,

The speed of light is exactly 299,792,458 m/s

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