A 12V battery is connected in series with two resistors, R1=4Ω and R2=6Ω, and a switch S1 that bypasses R1 when closed (the switch is wired in parallel with R1). Another switch S2 is in series with the entire resistor combination. Initially both switches are open. What is the current through the battery after both switches are closed?
(a) 5.0 A
(b) 2.0 A
(c) 1.2 A
(d) 3.0 A