I think maybe C? Not sure though, so don't take my word as gospel :)
Answer: People who betray their family.
Explanation: The ninth circle is home to those that committed treachery, making it a bite less specific than the way it was phrased in the question, but B is the closest.
The 'bright' side of the symbol of the marshy pool which denies the stranger access, bears the meaning of a united family, a well-defended country or a secure village, the still water being the image of a peacefulness which nothing can disturb
Who is tom?
