Which two commands should you use to determine why Router A is no longer the VRRP master? (Choose two.)

Router A is configured as the VRRP master and Router B is configured as the backup. Router A has lost the mastership and has become the backup router and you need to find out why.
Which two commands should you use to determine why Router A is no longer the VRRP master? (Choose two.)

A.
show vrrp

B.
show vrrp summary

C.
show vrrp detail

D.
show vrrp track

Explanation:
Syntax
show vrrp
<brief | detail | extensive | summary>
<interfaceinterface-name <group number>>
<logical-system (logical-system-name | all)>
<track <interfaces>>

Description
Display status information about Virtual Router Redundancy Protocol (VRRP) groups.

Options
none (Same as brief) Display brief status information about all VRRP interfaces.
brief | detail | extensive | summary (Optional) Display the specified level of output.
interfaceinterface-name <group number> (Optional) Display information and status about the specified VRRP interface, and, optionally, group number.
logical-system (all | logical-system-name) (Optional) Perform this operation on all logical systems or on a particular logical system.
track <interfaces> (Optional) Display information and status about VRRP track interfaces

show vrrp detail (Route Track)
user@host> show vrrp detail
Physical interface: ge-1/2/0, Unit: 0, Address: 30.30.30.30/24
Index: 67, SNMP ifIndex: 379, VRRP-Traps: enabled
Interface state: up, Group: 100, State: master
Priority: 150, Advertisement interval: 1, Authentication type: none
Preempt: yes, Accept-data mode: no, VIP count: 1, VIP: 30.30.30.100
Advertisement timer: 1.218s, Master router: 30.30.30.30
Virtual router uptime: 00:04:28, Master router uptime: 00:00:13
Virtual MAC: 00:00:5e:00:01:64
Tracking: enabled
Current priority: 150, Configured priority: 150
Priority hold-time: disabled
Interface tracking: disabled
Route tracking: enabled, Route count: 1
Route VRF name Route state Priority cost
192.168.40.0/22 default up 30

show vrrp track detail
user@host> show vrrp track detail
Tracked interface: ae1.211
State: up, Speed: 400m
Incurred priority cost: 0
Threshold Priority cost Active
400m 10
300m 60
200m 110
100m 160
down 190
Tracking VRRP interface: ae0.210, Group: 1
VR State: master
Current priority: 200, Configured priority: 200
Priority hold-time: disabled, Remaining-time: 50.351

show vrrp track summary
user@host> show vrrp track summary
Track if State Speed VRRP if Group VR State Current prio
ae1.211 up 400m ae0.210 1 master 200