Correct Answer:
C. about
The correct answer is about. The preposition 'about' is the most appropriate choice when expressing excitement concerning a particular subject or event. One is typically 'excited about' something that is anticipated or is the cause of their excitement.
- at: While 'excited at' can be used, it often refers to a specific moment or a reaction to news (e.g., 'excited at the news'), rather than a general anticipation of an event like a marriage.
- with: 'Excited with' is generally incorrect in this context. You might be 'excited with joy,' but not 'excited with her marriage.'
- over: 'Excited over' can sometimes be used, but 'excited about' is more natural and common for expressing anticipation or the subject of excitement for a future event.