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)