Has your quiz been placed online yet? If so, please do not move your quiz to a different category. But if your quiz is still in the queue:
You have to move the quiz up a few levels before the sub-levels of the Literature category will be displayed. From where your quiz is now, it should be possible to move it to the Literature main category. Save your quiz, go back into the edit screen and you'll see Literature subcategory options. Choose the one you want, save again, and if necessary repeat the previous steps for deeper subcategories.
The cost of living has not affected its popularity - Loesje