Well, let's go through the Alphabet and mention the letters that contain some closed space:
A, B, D, O, P, Q, R,
That's a total of 7 letters- so the correct answer is "seven"
In an alphabet of lower case letters there are many more, for example "e", "g"
B. Their , would be the correct answer, it makes the most sense .
"Using the title to hint at the ruins of a life of excess wealth" is an example of a metaphor in F. Scott Fitzgeralds short story "Babylon Revisited". The story titled "Babylon Revisited" take place in Paris. It seems like the author could write the story title as "Paris Revisited". However, F. Scott Fitzgeralds used the Babylon's name in the title to reflect the materialism and the wealthy aspect from the story<span>.</span>