The circuit is working, and all three bulbs are lit. If a switch at C is opened, what will happen to the circuit?
A. All three bulbs will stay lit.
B. Bulbs 2 and 3 will go out, but bulb 1 will remain lit.
C. Bulb 3 will go out, but bulbs 1 and 2 will remain lit.
D. All three bulbs will go out.
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