Three Identical Light Bulbs Are Connected in Parallel to a Constant

Multiple Choice

Three identical light bulbs are connected in parallel to a constant voltage power supply. Initially, switch S₁ is closed and the other two switches open. When the other two switches, S₂ and S₃, are closed, the brightness of the first light bulb

A) is dimmer.
B) is unchanged.
C) is brighter.
D) depends on how long the switches are on.
E) Insufficient information to tell since V and R are not given.