I'm leaning more towards B, to help the reader visualize Mrs. Sommers setting herself apart from the more crowded bargain area of the store, but just to be sure, check your text to get context clues and a definitive answer.
Are you talking about the book, The Landlady, then sure ill help :)
The overall answer is yes, because you never know when you need one, stretch the subjects out by adding as much information as possible
Ummarizing something is like paraphrasing it.
Making it smaller while still holding the general gist of something.
People generally summarize when they are taking notes.
An essay is a longer piece of work that is written on a topic from the author's point of view.