Which command is used to find the maximum number of virtual voice ports that that can be
defined for your Cisco Unified Communications Express system?

A.
R3(config)# showmax-ephone-dn

B.
R3(config-telephony)# max-dn

C.
R3(config-telephony)# showmax-ephone-dn

D.
R3# showmax-dn

Explanation: