In the passage from "A Doll's House", Nora is B) Glad that she finally has money to spend on gifts for the holidays.
After arriving, Nora is very eager to show her husband what she has bought for Christmas. Even though Helmer does not agree with such spending of money, she insists on him not to worry so much since he will earn a lot more money the next year. She excuses herself by explaining him that it is the first Christmas they did not need to economize. So, she is persuading him to relax about it.
You can take home your food for left overs or you can just order less.
Answer: Hyperbole
A hyperbole is an exaggeration that is not meant to be taken literally. It is usually used to make a persuasive point or to add emphasis. In this case, "opening a door to eternal tyranny" is an example of an exaggeration of this type. While it is likely that tyranny will not be eternal (the country itself will not be eternal), its purpose is to emphasize the risk of keeping the seat of governent vacant.
A hyphen would be suitable