What do good tragedies have in common?
They feature the downfall of man readers can relate to.
They all feature Oedipus at some point in the story.
They each have multiple, very complicated plots.
They end on a positive note for the main character

All good tragedies have one huge distinctive similarity; the heartbreak it ensues. No matter what tragedy one might experience, they have something in common with all other who have experienced their own tragedy. While the single tragedies we experience alone are confined to our experience and causes as to why the tragedy happened however, what all have in common through tragedy is heart break even though it was caused by unique things, the heart break is indentical.

c. with one finger is the answer