Refer to the exhibit.

A user's laptop only operates in the 2.4 GHz band and supports 802.11n. This user reports that the network is slow at the cafeteria that is serviced by three APs, and suggests that there might be a problem with the WLAN. The network administrator finds the user in the MM, and obrains the output shown in the exhibit.
What should the network administrator do to optimize the client connection?