To minimize reassociation time as mobile devices roam among access points across many device types, which feature should be configured?

802.11v Disassociation Imminent is the correct feature. This standard allows an access point (AP) to send a management frame to a client device, notifying it that the AP intends to disassociate it soon. This gives the client time to proactively search for and connect to a new AP, significantly reducing the reassociation time during roaming. 802.11v BSS Max Idle Service is incorrect because it deals with client power saving by informing the client of the maximum idle time before it's disassociated, not proactive roaming. 802.11ax BSS configure refers to the latest Wi-Fi standard and its basic service set configurations, which doesn't directly address minimizing reassociation time through proactive notification. 802.11k neighbor List Dual Band is incorrect because 802.11k helps clients discover neighboring APs and their capabilities, but it doesn't proactively notify a client of an impending disassociation to speed up the roaming process.