Breaking down the question- defining what a "serious threat" is
Picking 4/5 topics to base argument around: Military opposition/ Use of terror on people of Germany/ Political opposition/ Youth groups/ issue of conformity vs non conformity
Use each one of these topics as a basis for the paragraph and give arguments for how each one could be viewed as a "serious threat" or not
Come to a justified judgment as to whether the nazi regime did or did not face any "serious threats" from within Germany