Answer:
C. their secret enterprise
They are opposing ideas, so yes. A dream is NOT reality and vice versa. Yes the phrase is an oxymoron.
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Love is affection, either friendship wise or relationship wise. It means you really enjoy being around that person. What does love mean to you?
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I can help you with 17! People can be nervous if they are in a situation where time isn't on there side, or when they are around someone they find attractive (a crush) and people can get nervous when they are in a competition and they want to succeed at whatever they are doing(like a sport for example)
Hope this helped a little!! :)