Final answer:
Tragedies typically involve main characters making ethical choices and often end unhappily, but they were not invented by Shakespeare.
Step-by-step explanation:
Tragedies, as a genre, typically involve main characters facing ethical choices and often end unhappily. One aspect that is not true of tragedies is that they were invented by Shakespeare. Tragedies have been around since ancient times, with examples like Sophocles' Oedipus Trilogy.
While tragedies often feature characters of noble birth, it is not a requirement for the genre. Characters can be everyday people, as seen in Henrik Ibsen's plays. Therefore, the correct answer is c) They were invented by Shakespeare.