Four identical bulbs are shown in the circuit in Figure Q16.9. With the switch open, bul...

Four identical bulbs are shown in the circuit in Figure Q16.9. With the switch open, bulbs 1, 2, and 3 are equally bright and bulb 4 is dark. How does the brightness of bulbs 1, 2, and 3 change when the switch is closed?

(a) 1 and 2 stay the same and 3 gets brighter.

(b) 1, 2, and 3 stay the same.

(c) 1 and 3 get brighter and 2 gets dimmer.

(d) 1, 2, and 3 all get brighter.

(e) None of these is correct.