In the damped vibration experiment, it is required to reduce the damping ratio by half by changing the mass value only $($i$.$e$.$ all other parameters kept unchanged$).$ The mass must be multiplied by :

$($A$)1\mathrm{.}5$

$($B$)$

$2$

$($C$)4$

$($D$)\sqrt[\phantom{2}]{2}$