The subsequent problems deal with the circuit below where all voltage sources are dc and the circuit is assumed to be in steady state. Also, R1 = R2 = R3 = R4 = R.The power added to the circuit by source V3 is

A. ?I3 / V3
B. I3 / V3
C. ?I3V3
D. I3V3
E. 0


Answer: D

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