Answer:
A.
Explanation:
Filer means to stop what you don't want and do what you need to. Therefore I think focus is the right answer.
Thanks!
B reformation that’s the answer
If you are talking about books, then there are two important American classics that were written in 1947, so I guess you can choose either one of them:
1. A Streetcar Named Desire, written by Tennessee Williams
2. The Pearl, written by John Steinbeck
If you are not talking about books, then you should tell us what you mean by classics.