This one suprised me. I knew that "stenen" was a common pronunciation. However, I did not think that it was an accepted alternative spelling for "steinen" in Bokmål.
Those that say stenen would write it that way, although in my experience steinen is far more used, also in pronunciation. But my dialect uses diphtongs a lot...
Ditto. I just ignored it as the course only covered the "steinen" spelling.
Would "Trakk han virkelig sverdet ut av steinen" have been an acceptable answer?