Which two conditions can cause a combined VMware DRS/HA cluster to change to a redstatus?

Which two conditions can cause a combined VMware DRS/HA cluster to change to a red
status? (Choose Two.)

A.
DRS is in the process of balancing resources among hosts in the cluster when an HA
event occurs.

B.
The current failover capacity is smaller than the configured capacity.

C.
A DRS-only host has been added to an HA cluster.

D.
All the primary hosts in the cluster are not responding.