[单选题]
A simple RL circuit contai4d:.1h k 5 t:g6en fcj*3vqzrcov ld)dns a 6.0-W resistor and an 18-H inductor. p y5 0q w2kp+rebf.jj* What is this circujkp qb 5 02p*j+.fwreyit's time constant?
A. $108 \; s$
B. $3.0 \; s$
C. $0.33 \; s$
D. none of the given answers
