A $25 - \mathrm { mH }$ Inductor Is Connected in Series with A

A $25 - \mathrm { mH }$ inductor is connected in series with a $20 - \Omega$ resistor through an ideal $15 - \mathrm { V }$ dc power supply and a switch. If the switch is closed at time $t = 0 \mathrm {~s}$ , what is the current when $t = 2.0 \mathrm {~ms}$ ?

A) $0.80 \mathrm {~A}$
B) $0.60 \mathrm {~A}$
C) $0.40 \mathrm {~A}$
D) $0.50 \mathrm {~A}$
E) $0.70 \mathrm {~A}$