What Resistance Should Be Added in Series with A $6.0 \mathrm { H }$

Multiple Choice

What resistance should be added in series with a $6.0 \mathrm { H }$ inductor to give a circuit with a time constant of $3.0 \mathrm {~ms}$ ?

A) $2.0 \Omega$
B) $2.9 \Omega$
C) $2.0 \mathrm { k } \Omega$
D) $18 \Omega$