I'm gonna go with a free textbook, cause it's free duh :))
Answer: B.
Explanation:
Because a tragedy usually ends in a death of someone on a mission, take romeo and juliet for example
In order to be able to answer this, we'd need to know what book it is you're reading, as well as the answer choices as the question asks "which of the following best" meaning that they want you to choose the best answer from the choices they’re giving you.