Situation: you have a multiple choice question. You add (for example) five choices but then decide to reduce them to four.
If you cancel all the descriptions and select the grading to none to eliminate that choice, it will still show up empty in the question. To effectively eliminate that choice you must select html and eliminate all the html tags. However, also this seems rather complicated because it seems that it works only if you "save and continue editing". If you save and exit the system somewhat re-add the html tags