Should the number plate light be turned on together with the rest of the lights?

Should the number plate light be turned on together with the rest of the lights?
A)Only with the dipped or low beam headlights.
B)It will be switched on simultaneously with the position lights.Correct
C)It will be switched on with an independent switch located on the dashboard.
When the position lights are switched on, the number plate light must be switched on simultaneously, remaining on together with any other lights we use afterwards.