How best can throughput capacity be uniquely added to a single channel architecture (SCA) WLAN system?

A.
By placing APs that are on a single channel more closely together

B.
By using a channel reuse pattern similar to multiple channel architecture (MCA) WLAN systems

C.
By adding more radios to an AP or co-locating more APs, and having each radio on a different channel

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

E.
By enabled multiple data streams on each radio within an AP