What happened?! ¯\_(ツ)_/¯
Answer:
I think D because you said it
Explanation:
C is the answer you are looking for. A common idea isn't a moral, the generalization is the Main Idea, but not quite the moral. The thought of the characters almost never have the moral in them. Therefore, C is your answer.
The main purpose of the following....
the only answer that would make sense is TO DIRECT the other choices don't make sense. because it;s telling the reader how to put the swing set together that's the same thing as directing them.
hope this helps and hope i'm right:)