Which statement about the control link in a chassis cluster is correct?

Which statement about the control link in a chassis cluster is correct?
A . A cluster can have redundant control links.
B . Recovering from a control link failure requires a reboot.
C . The control link heartbeats contain the configuration file of the nodes.
D . The control messages sent over the link are encrypted by default.

Answer: A

Explanation:

Reference: https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-chassis-cluster-dual-control-links.html