I'm so excited ____ my brother. He just got a new job!

• A. About
• B. For
• C. To
• D. With

Answer: (B)

The idea being tested is which preposition naturally follows the adjective excited when you’re expressing happiness for someone else. When you say you’re excited for someone, you’re feeling happiness or anticipation on that person’s behalf.

In this sentence, you’re reacting to your brother’s news—his new job—so you’re excited for him. That’s the natural way to convey support and positive feeling about someone else’s achievement. “Excited about” would focus on the thing itself rather than the person, and “excited to” would need an action (excited to do something), while “excited with” isn’t used here. So the correct choice is for.