How is throughput capacity scaled in a single channel architecture (SCA) WLAN system?

A.
By increasing transmit power and placing APs that are on a single channel farther from one another.

B.
By adding more SSIDs to existing APs to spread users across different contention domains.

C.
By adding non-overlapping channel layers through the addition of more APs.

D.
By using downlink data compression and uplink flow control at the AP.

E.
By using a single 802.11n radio to transmit simultaneous downlink data streams to different users.