The answer is:
Krogstad tries to blackmail Nora into getting Helmer to keep him at the bank by exposing her forgery.
In "A Doll's House," by Henrik Ibsen, Krogstad has lent money to Nora illegally and secretly to pay for her husband's health treatment in Italy. As a consequence, when Torvald wishes to dismiss Krogstad from his job at the bank, the latter demands to Nora that she persuades her husband so that he can keep his job, and threatens to write a letter to Torvald revealing his wife's fraud.
William Prescott said this quote.
The correct answer for the question that is being presented above is this one: "developed art of story telling." <span>Mark Twain developed the art of story telling, and that was his greatest contribution to the history of the novel. This contribution of Mark Twain is commonly used until today.</span>
