I have no idea if this is the case since I don't use Hulu, but I'm guessing if you pick the wrong one they could make you watch another segment of the ad with the right answer to help correct you or something.
Because families get it for Disney+ to let Moana/Spiderman/Elsa babysit their kids during the day and figure "Heck, why not add the extra little cost to get Hulu with it since we're already paying so much?"
It's a great thing that Disney was allowed to buy Fox under the blessing of the Trump FTC, isn't it?