[单选题]
Consider an RLC series circuit. The impedance z tjvqx6: m2a(of the circuit increasesthlb co ;t /h:a7v+k33qv el9n if $X_C$ 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