A Simple RL Circuit Contains a 4 $\Omega$ Resistor and an 32-H Inductor

Multiple Choice

A simple RL circuit contains a 4.0- $\Omega$ resistor and an 32-H inductor. The circuit's time constant is

A) 130 s.
B) 8.0 s.
C) 4.0 s.
D) 2.0 s.
E) 0.13 s.