You're right, there was an error. I've fixed the question in the quiz, and it's shown as it is now.
Shown in a box to the one who made the quiz, after they gave a question a thumbs down and said it has an error, and Claude ("I") checked it, found an error and fixed it: the question in the list is now the fixed one. In the first person, as Tjaz's AI speaks
Du hast recht, da war ein Fehler. Ich habe die Frage im Quiz korrigiert, und hier siehst du sie jetzt in der neuen Fassung.