Which of the IP Office deployments listed below has the highest specifications and functional capabilities?
A . Avaya IP Office Server Edition
B . Avaya IP Office Preferred Edition
C . Avaya IP Office 500v2 with UCM Server
D . Avaya IP Office Essential Edition
Reference: https://ipofficekb.avaya.com/businesspartner/ipoffice/mergedProjects/manuals/Avaya%20IP%20Office%20Platform%20Feature%20Description_en-us.pdf (13)