Because life was boring and basically meaningless
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.
The answer is D: A magazine article describing how people's lives have been improved by products developed as a result of the space program.
The most compelling piece of evidence is to show —like the article of the magazine does, which would have to be founded on evidence that could be corroborated— how and in what sense the lives of human beings have been improved by space exploration and showing, also, that these benefits outweigh the cost of space exploration.
Answer:
She likes to eat vegetables, but sh does not like to eat spinach- Compound sentence
Summer is my favorite season because we can go to the beach- Complex sentence
I like to gather seashells on the beach, and I enjoy getting my feet wet- Compound sentence
After I come home from school, I need to do homework- Complex sentence
Explanation:
A compound sentence is two clauses put together with a coma and a FANBOYS (For, and, nor, but, or, yet, so).