Which character is the best example of a tragic hero?

 A.A queen, mistreated by her husband and sons, gets her revenge by placing a terrible curse on the land. B.While searching for his place in the world, an orphan encounters many unfortunate situations before he is able to find his family. C.A young student tries to overthrow the student government after his friends abandon him. D.A vain king who values appearance over truth loses his throne and eventually his life after he tries to test the population's loyalty to him