Which wireless products can be implemented as stand-alone or as a cluster of APs?

Which wireless products can be implemented as stand-alone or as a cluster of APs?

A.
Cisco 110/300/500 Series

B.
Cisco WLC 2500/SRE

C.
Cisco 2600/3600 Series

D.
Cisco 700/1600 Series

E.
Cisco Meraki MR Series

Explanation: