Which of the following points are not the highlights in WOC program?

Which of the following points are not the highlights in WOC program?
A . signal is strong, connection is stable.
B . access bandwidth is large, suitable for multi-user access
C . Low radiation, through power splitters, effective control of AP power, to maximize each signal energy efficiency, solving the problem of excessive radiation
D . simple construction and low cost. Use of existing network transformation, without wall punching, pull, only increase the WOC equipment, low engineering cost

Answer: B