The central theme of the text is that tragedy ought to be openly expressed and not hidden away. Hence the correct answer is C.
The theme of a text is the main idea it is trying to communicate to the readers.
You can identify a central theme by looking carefully at the opening remarks of a paragraph, or the first chapter of a book as well as it's conclusion.
See the link below for more about themes:
https://brainly.com/question/11600913