Answer: Fabio's attitude changed because he'd be in the parade.
Explanation: Fabio is excited to be able to participate in the parade. The focus of the question isn't on why he'd be in the parade or how? But on what makes his attitude change. Every other factor mentioned corroborates that he'd be participating in the parade.
I would say the answer is D. A and C don't make sense until you know what the speech is about, so we can rule those two out. B makes sense just a tad bit. But, we do have to know what we are donating to. D sets the scene about what the Fund does, and why you should donate to them.
Your answer should be D.
Hope this helps!
Their age is the difference
