Krogstad introduces a conflict by blackmailing Nora to secure his position at the bank.
The conflict introduced by Krogstad in the excerpt from A Doll's House is that he tries to blackmail Nora into influencing her husband to keep him at the bank by threatening to expose her forgery. Krogstad's demand to rehabilitate himself and return to a higher position in the bank puts Nora in a difficult position, leading to a power struggle between them.
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