What kind of lights do powered vehicles (motorized wheelchairs, etc.) have?

Answer: C — flashing amber light

Powered vehicles, such as motorized wheelchairs, are required to have flashing amber lights in order to notify others of their presence and avoid possible collisions. Option A is incorrect because standard headlights are used for larger vehicles and may be too bright and distracting for others. Option B is incorrect because flashing blue lights are typically used by emergency vehicles and could cause confusion on the road. Option D is incorrect because, as mentioned, flashing amber lights are a specific requirement for powered vehicles.