What factor will have the most significant impact on the amount of wireless throughput available to each station within a BSS?

What factor will have the most significant impact on the amount of wireless throughput available to each station within a BSS?
A . The Layer 3 protocol used by each station to transmit data over the wireless link
B . The number of client stations associated to the BSS
C . The power management settings in the access point beacons
D . The presence of co-located (10m away) access points on non-overlapping channels

Answer: B