What does an earlier deployed action with a current state of Open indicate?

A.
The action has been opened by the client running on the target endpoints.

B.
The action is still running on relevant machines. It remains open until the completion state is
100%.

C.
The action is currently being edited by another operator and will remain open until the action
has been saved.

D.
The action is active and will run on any endpoint that is relevant. It remains open until its
expiration date elapses, or an operator stops it.