Answer:
it's b from foolish to clever
hope i'm not late to answer <3
If the literature involves romanticism, tragic story lines and drama, then it is in the slow paced writing situations. If the story lines involve actions and adventures, then it is in the fast paced writing situations. The pace of the situations will affect the reader on how they will interpret the story line.
You are most likely talking about the radar, which scans and alerts the people on the submarine of other submarines, missiles, etc. nearby.