56. A series RLC circuit is connected to an ac source 5ed871c37f86c.jpgThe resistance, capacitive reactance and inductive reactance are 40 Ω, 80 Ω, and 50 Ω respectively. What is the current (5ed871e887d98.jpg) in the circuit?
(A) 3.0 A
(B) 0.040 A
(C) 1.7 A
(D) 1.4 A
(E) 2.4 A

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統計： A(1), B(0), C(0), D(2), E(33) #2336756