The answer is D: None of the above.
If Daisy successfully evades the Ghoul Minion this will trigger two separate steps:
1) the Ghoul Minion is exhausted.
2) the engagement is broken: the Ghoul Minion moves back to the location (in this case the hallway)
At the end of the round the Ghoul Minion will ready. At this time if there is one or more investigators in the hallway it will then engage one of them and move to that investigators threat area.
The ghoul is in the hallway, the investigators are in the attic. So the ghoul readys then goes to the attic and engages one of the investigators?
No.
Here is how this works.
Daisy is engaged with a Ghoul, spends her first action evading. She is successful! The ghoul is now exhausted and taken out of Daisy's threat area and put into the location area for "The Hallway" (where Daisy currently is).
Daisy takes her second action and goes to the Attic, and then does anything with her third action.
Now Skids (or whoever) goes. He is also in the Hallway, he takes his first action and moves to the Attic. He does whatever he wants with his other two actions, but stays in the Attic.
Now we enter the Enemy Phase.
(Ready, Unenaged) Hunter enemies will move one step closer to investigators. This Ghoul Minion is not a Hunter, so he doesn't move.
Ready, Engaged monsters attack the investigator they are engaged with. The Ghoul Minion is not engaged (nor is he Ready) with anyone anymore, so does nothing.
During the Upkeep Phase, exhausted cards "Ready", which includes the Ghoul Minion who will now be Ready at the Hallway.
If both Daisy and Skids stay in the Attic, never leaving, during this whole next Investigator Phase, we will once again enter the Enemy Phase:
Where the Ghoul Minion does nothing at all.
When someone finally leaves the Attic and goes back to the Hallway, the Ghoul Minion, who is ready, will engage that investigator, putting you back in the state we began this example in.
Edit: I skipped the phases that weren't relevant for this example. I urge you to go look at the back of the Rules Reference, the timing charts are pretty clear about the order and sequence. If you have questions, let us know so we can help. I also added two comments about "Ready" above.
Edited by SuperMarino