Using CIDR notation, the subnet mask $255\mathrm{.}255\mathrm{.}255\mathrm{.}252$ would be written as $\_\_\_\_\_\_\_.$

Group of answer choices

x$.$x$.$x$.$x$/25$

x$.$x$.$x$.$x$/24$

x$.$x$.$x$.$x$/32$

x$.$x$.$x$.$x$/30$