You are designing a wireless network for a client. Your client needs the network to support a data rate of at least $54$ Mbps $.$ In addition, the client already has a wireless telephone system installed that operates at $2\mathrm{.}4$ GHz $.$

Which $802\mathrm{.}11$ standard will work BEST in this situation?

$802\mathrm{.}11$d

$802\mathrm{.}11$C

$802\mathrm{.}11$g

$802\mathrm{.}11$ b

$802\mathrm{.}11$a