Nora: Nurse, I want you to tell me something I have often wondered about--how could you have the heart to put your own child out among strangers? Nurse: I was obliged to, if I wanted to be little Nora's Nurse.
Nora: Yes, but how could you be willing to do it?
Nurse: What, when I was going to get such a good place by it? A poor girl who has got into trouble should be glad to. Besides, that wicked man didn't do a single thing for me.
Nora: But I suppose your daughter has quite forgotten you. -A Doll's House, Henrik Ibsen

How does this interaction between
Nora and the nurse affect the plot?

Nora discusses the nurse's child with her, which creates conflict
Nora thinks about leaving her own family, which builds suspense.
Nora thinks about leaving her own family, which reveals her motivations.
Nora is not on a first-name basis with her nurse, which reveals her personality