Which of the following describes the change in brightness of a lamp when you add more lamps in parallel?

Adding more lamps in parallel increases the brightness of any given lamp

Adding more lamps in parallel decreases the brightness of any given lamp

Adding more lamps in parallel does not change the brightness of any given lamp

Adding one more lamp in parallel does not change the brightness of the first light, but adding more than one will change the brightness.
unanswered

Adding more lamps in parallel does not change the brightness of any given lamp