Which option describes why duplicate IP addresses reside on the same network in Cisco network design?

A.
HSRP designed network

B.
Using Cisco ACE in active/passive mode

C.
VRRP designed network

D.
Running multiple routing protocols

Explanation:
Strange Q. Wrong config on FHRP could also end up in duplicate address. EDIT: Actually, the Q ask for a VALID design where there is duplicate address.