How does interaction between Helmer and Nora Advance the plot

A. Nora realizes that Helmer will completely disapprove of her having borrowed money, so she has to continue to keep it a secret from him.

Explanation:

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Nora has a flirtatious behavior that suggests that Helmer and she have a flirtatious but stable relationship but sometimes it is serious. Helmer supports the careless attitude of Nora with money and he also worries and criticizes her habit of squandering money to make her understand the value of saving. This behavior shows that there is still a lot of love in their relationship and that it is not a couple with a bad mood.