Refer to the exhibit.

R1
key chain cisco123 key 1 key-string Cisco123! Ethernet0/0 - Group 10 State is Active 8 state changes, last state change 00:02:49 Virtual IP address is 192.168.0.1 Active Virtual MAC address is 0000.0c07.ac0a Local virtual MAC address 0000.0c07.ac0a (v1 default) Hello time 5 sec, hold time 15 sec Next hello sent in 2.880 secs Authentication MD5, key-chain "cisco123" Preemption enabled Active router is local Standby router is unknown Priority 255 (configured 255) Group name is "workstation-group" (cfgd)

R2
key chain cisco123 key 1 key-string Cisco123! Ethernet0/0 - Group 10 State is Active 17 state changes, last state change 00:02:17 Virtual IP address is 192.168.0.1 Active Virtual MAC address is 0000.0c07.ac0a Local virtual MAC address 0000.0c07.ac0a (v1 default) Hello time 10 sec, hold time 30 sec Next hello sent in 6.720 secs Authentication MD5, key-chain "cisco123" Preemption disabled Active router is local Standby router is unknown Priority 200 (configured 200) Group name is "workstation-group" (cfgd)

An engineer is installing a new pair of routers in a redundant configuration. When checking on the standby status of each router, the engineer notices that the routers are not functioning as expected.
Which action will resolve the configuration error?

A.	configure matching hold and delay timers
B.	configure matching key-strings
C.	configure matching priority values
D.	configure unique virtual IP addresses