Short answer: You are answering why?
Why doesn't she want to go out? She doesn't want to go out because she's in a very bad mood. She knows that she won't be good company.
Remark
The sentence after the ; (semicolon) does not begin with any kind of connective word. If you put a noun in place of she, you would see that the last part after the semicolon is a complete sentence.
The core subject of history also includes civics and government studies.
You didn't underline anything, so we cannot know for sure what the correct answer is. However, I'll just write down the entire infinitive phrases in these sentences, and you can see the answer based on that:
1. to see a great play
2. to cheer good plays
3. to practice until you know all the plays
Answer:
It reveals the flaws inherent in the couple’s relationship.
Explanation: