[单选题]
Consider an RLC circuit.b+tmp in)z4 x0c jhdns-:qjk4(75 p gz The impedance of the circuit increases if $X_L$ increases. When is this statement true?
A. always true
B. true only if $X_L$ is less than or equal to $X_C$
C. true only if $X_L$ is greater than or equal to $X_C$
D. never true