Which IEEE 802.11 standard allows the endpoint of a subscriber to dynamically locate and connect to a wireless network that belongs to their service provider or a roaming partner?

Which IEEE 802.11 standard allows the endpoint of a subscriber to dynamically locate and
connect to a wireless network that belongs to their service provider or a roaming partner?

A.
IEEE 802.11u – “Interworking with External Networks”

B.
IEEE 802.11r – “Fast Basic Service Set (BSS) Transition”

C.
IEEE 802.11v – “Wireless Network Management”

D.
IEEE 802.11k – “Radio Resource Management