The answer is A) description because the teacher is describing the exact consequence for the exact behaviour. We can see that she has little time for nonsense and for misbehaviour and that she is strict and doles out punishments. While we can see this through actual dialogue it is not dialogue that characterizes the teacher. Pacing is used to see how fast or slow the story progresses and reflection is looking back on a story.
Answer:
1. Someone should send the email today.
2. The employees have left the documents behind.
3. They served the breakfast in the dining room.
4. Has anyone read the instruction?
5. Someone offered him a good job.
6. Someone had to call the ambulance.
7. The mechanics will repair my car next week.
8. Someone is breaking down the old bridge at this moment.
9. They said he is an excellent guitarist.
10. Open the windows.
11. My parents adviced me to get a visa.
12. Why did someone break the glass?
Explanation:
I used "someone" when the doer wasn't identified, I think you're free to use "you" or "them" depending on the situation.