Answer: D) the occasional scratch of her pen exerted just enough pressure to keep away the frightening shadows, the sad spirits from long ago, locked into events that couldn't change.
This excerpt shows that the speaker believes that the present is more powerful than the past. He describes the memories of the woman's past as "frightening shadows" and "sad spirits." Moreover, he tells us that these memories are "kept away," "locked" and cannot change. These words have negative connotations and they encourage a view of the past as sad, pointless and powerless.