<em>"A Doll's House"</em> is a play written by Henrik Ibsen which was published in 1879 and performed that same year. Nora Helmer is the protagonist of the play and the wife of Torvald Helmer. Nils Krogstad is the antagonist of the play who is willing to make Nora suffer even though he says that he feels sympathy for her.
The correct answer is option A: The stage direcitons in brackets<u>show that Nora goes from playing happily with her children to being startled by Krogstad, an unwelcome visitor.</u>