DON’T DOUBT USAGI AND THE POWER OF RANDOM BUTTONS, LUNA.
(I find it interesting that it ends up being so blatant and yet doesn’t brainwash them. I think the magic must rely on the focus students put into studying, like because they believe that the disk is going to help them they’re vulnerable, while Usagi both has her guard up and isn’t focused at all. If Luna had made her try to earnestly answer the questions, I think it might have gone differently.)