Help me plz Number 3 and 4

What is the central idea of this excerpt?

Exit in which of the following passages from the text is the author's motif of displacement and separation most evident? a. "in these ways it was a typical wartime departure, full of proud smiles and half-concealed worry." b. "it upheld the army's decision to limit the movements of a racially select group of citizens." c. "once the first year's turmoil cooled down, the authorities started letting us outside…" d. "if anything made that country habitable it was the mountains themselves…"

Read the excerpt from how the grimm brothers saved the fairy tale. which idea does the author develop with the text example cited in the excerpt ?