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

-Determine the current through R₁ when the switch S is closed on A.

A) 1 A
B) 2 A
C) 3 A
D) 6 A
E) 12 A