What are two possible causes of the higher utilization?

You have set up a chassis cluster in an active-active state. While monitoring the fabric link during a failover scenario, you noticed the utilization is higher than expected.

What are two possible causes of the higher utilization? (Choose two)

A.
An upstream link failure has resulted in Internet-bound traffic ingressing the primary node and egressing the secondary node.

B.
The failover from the primary node to the secondary node has resulted in increased heartbeat and RTO traffic.

C.
A LAN interface failure has resulted in Internet-bound traffic ingressing the secondary node and egressing the primary node.

D.
The failover from the primary node to the secondary node has resulted in a graceful restart scenario in which all traffic must use the fabric link.