[单选题]
Consider an RLC series circuit. The j+. 2 leggz5bzimpedance of thq/jg3fl4/ xlae circuit increases 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