The Figure Shows a Circuit

Multiple Choice

The figure shows a circuit.The switch S can be closed on either point A or C,but not both at the same time.Use the following quantities:
V₁ = V₂ = 12 V
R₁ = R₄ = 1.0 W
R₂ = R₃ = 2.0 W

-At what rate is energy dissipated by R₁ when the switch S is closed on A?

A) 1 W
B) 4 W
C) 9 W
D) 36 W
E) 144 W