Which of the following describes a split brain situation in a high availability cluster?

A.
Several cluster nodes access a shared resource without coordination.

B.
Several cluster nodes run different instances of the same services.

C.
Incoming network connections are accidentally forwarded to more than one backend server.

D.
Instead of shared storage, each node uses local storage managed by itself and replicates with other nodes.

E.
In addition to shared storage, each node has local storage that is not shared with other nodes.