All of them. When I mentioned that I only had difficulties with one person to the one I subbed for, she knew immediately who, listed off the same things (before I mentioned what the troubles were) and said "I was just too busy to deal with them."
The department chair is her advisor. I recommended simply having her take it again. Offering this was his deal. She pushes him around a lot.
We're "arguing" whether NBC News videos and YouTube videos count as primary sources for an event 100 years ago. Since she loves videos, I sent her one, and then spelled out that we can do this right or she can fail.
But yeah, she's done this to all of them and it works.