B.
The sentence should be:
"Antoine brushed his teeth before he ate his breakfast."
True. An author will only mention a famous person/event assuming his/her audience will be familiar with them/it.
How many athletes were sampled, that is the answer.
In this story, there are two main conflicts: The cruel lord's law on banishing the elderly, and the evil warlord Lord Higa's riddles and impending invasion. Complications in the plot add complexity to the story. They help keep the reader interested.
The correct answer is A, right to protect themselves.
