It is irony. Normally, when someone is unusually prompt, they are early. However, the speaker is using irony to say that her doctor is always late.
C. An article in a scientific journal on the impact of sleep on student brains
I think
Answer: A
Explanation: Took The Quiz
The clock reinforces the theme of the story that no one can escape death.
The fear each of the guests feels when the clock chimes reflects the fear that they have of death.
By ticking down the moments, the clock reinforces the idea that time is running out for the Prince and his guests.
I took and got %100 on the quiz. Hope I help!