Select the correct answer. We are told that the Network we are dealing with is a standard Class B network ie$.$ there is NO subnetting involved here. What would be the Subnet mask associate with this network? Question $6$ Select one:A$\mathrm{.}255\mathrm{.}255\mathrm{.}255\mathrm{.}0$B$\mathrm{.}255\mathrm{.}255\mathrm{.}255\mathrm{.}240$C$\mathrm{.}255\mathrm{.}255\mathrm{.}0\mathrm{.}0$D$.$None of the above