What is the interaction between CDP, ISDP, and LLDP when communicating configuration information from a Dell EMC Campus networking switch to a Cisco VoIP phone?

What is the interaction between CDP, ISDP, and LLDP when communicating configuration information from a Dell EMC Campus networking switch to a Cisco VoIP phone?
A . N-Series switches can be configured to use LLDP or CDP to communicate configuration information with Cisco devices
B . N-Series switches can be configured to use only CDP to communicate configuration information with Cisco devices
C . N-Series switches can be configured to use ISDP or CDP to communicate configuration information with Cisco devices
D . N-Series switches can be configured to use ISDP or LLDP to communicate configuration information with Cisco devices

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Answer: D