
70 For the circuit shown, a shorting wire of negligible resistance is added to the circuit between points A and B . When this shorting wire is added, bulb \#3 goes out. Which bulbs (all identical) in the circuit brighten?
(A) Only Bulb 4
(B) Only Bulbs 1 and 4
(C) Only Bulbs 2 and 4
(D) Bulbs 1, 2 and 4