Sorry to say this but I think the question is asking you what event would make you feel as happy as billy, not anyone else.
Answer:
write a letter to your friend in usa about the culture of Turks Caicos island
Im pretty sure it’s B. “Katherine worked on every space misson at NASA until she retired in 1986.”
That's true!
An interjection is like "Wow!", etc. It does not need to be accompanied by words.
