The supply voltage to a room is 120 V. The resistance of the lead wires is 6 $\Omega$. A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb?

Question

( A ) zero volt
( B ) 13.3 Volt
( C ) 10.04 Volt
( D ) 2.9 Volt