While investigating the cause of a device failover, an LTM Specialist discovers the following events in /var/
log/ltm:
01010029:5: Clock advanced by 518 ticks01010029:5: Clock advanced by 505 ticks
01010029:5: Clock advanced by 590 ticks
01010029:5: Clock advanced by 568 ticks
01010029:5: Clock advanced by 1681 ticks
01010029:5: Clock advanced by 6584 ticks
01140029:5: HA daemon_heartbeat tmm fails action is failover and restart.
010c0026:5: Failover condition, active attempting to go standby.
Which issue caused the failover?

A.
NTP being out of sync

B.
TMM being descheduled

C.
VLAN Fail-safe heartbeats

D.
HA missing heartbeat packets