You are responsible for a Wireless Local Area Network $($WLAN$)$ that consists of an $802\mathrm{.}11$n $2$x$2$ access point and laptop computers with a variety of network adapters. Some of the laptops support $802\mathrm{.}11$n$,$ most support $802\mathrm{.}11$g$,$ and a few older models have $802\mathrm{.}11$b adapters. The WLAN is located in a large office building with many other wireless networks, and you are having trouble finding a channel on the $2\mathrm{.}4$ GHz band that is not congested with traffic. Scanning the $5$ GHz band, you find relatively little traffic, so you reconfigure the access point to use a $5$ GHz channel. The result is that some of the laptops are able to connect to the network, whereas others are not. What is the most likely reason for the connection failures, and what must you do to enable all the laptops to connect to the wireless network?

Group of answer choices

The $802\mathrm{.}11$b standard does not support communication using the $5$ GHz band. You must replace the network adapters in those laptops with newer models for them to connect successfully.

The $5$ GHz band does not support automatic channel selection. You must configure each laptop to use the same channel as the access point for all the laptops to connect successfully.

The $5$ GHz band does not support Multiple Input, Multiple Output $($MIMO$)$ communications, so the $802\mathrm{.}11$n laptops are unable to connect to the network. You must replace the access point with an $802\mathrm{.}11$g unit for all the laptops to connect successfully.

The $802\mathrm{.}11$g and $802\mathrm{.}11$b standards do not support communication using the $5$ GHz band. You must configure the access point to support $2\mathrm{.}4$ GHz for all the laptops to connect successfully.