This does not include cards that affect one or more Game Objects based on criteria. Example: "Stun a unit at a battlefield" is a Choice. Example: "Kill all gear" is not a Choice.
§ 355.5.a Core Rules PDF (officieel)
§ 355 2. Make relevant choices.
§ 355.5 If a card requires you to specifically choose one or more Game Objects, that choice is made now.