Three Identical Lightbulbs Are Connected in Parallel to a Constant

Three identical lightbulbs 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 B₁

A) will be less.
B) will be unchanged.
C) will be more.
D) will depend on how long the switches are on.
E) cannot be predicted without knowledge of V and resistance.