Read the excerpt from act 3 of A Doll’s House. Mrs. Linde [looking at her watch] : Not yet—and the time is nearly up. If only he does not—. [Listens again.] Ah, there he is. [Goes into the hall and opens the outer door carefully. Light footsteps are heard on the stairs. She whispers.] Come in. There is no one here. Krogstad [in the doorway] : I found a note from you at home. What does this mean? Mrs. Linde: It is absolutely necessary that I should have a talk with you. Krogstad: Really? And is it absolutely necessary that it should be here? Mrs. Linde: It is impossible where I live; there is no private entrance to my rooms. Come in; we are quite alone. The maid is asleep, and the Helmers are at the dance upstairs. Which statement best explains how the conventions of plot and setting contribute to the theme?