“The same little featherhead!”, “That is like a woman!”, “What is this! Is my little squirrel out of temper?”
The are the three best options that show Torvald sometimes treats Nora like a child. Calling Nora a "little featherhead" and "little squirrel out of temper" gives her appearance of a person who is not very wise or intelligent. It makes her seem innocent and ignorant much like a child would be. When Torvald says, "That is like a woman!", it is not just a statement of fact. Torvald sees women as innocent, ignorant and helpless much like a child would be. The other two options do not fit because that do not show that Torvald thinks of Nora as a child.
