How many APs for workgroup bridging must be ordered to keep cost at a minimum while connecting all devices?

A rapidly expanding company has tasked their network engineer with wirelessly connecting a new cubicle area with Cisco workgroup bridges until the wired network is complete. Each of 42 new users has a computer and VoIP phone.

How many APs for workgroup bridging must be ordered to keep cost at a minimum while connecting all devices?
A . 4
B . 5
C . 6
D . 7

Answer: A