Answer:
The correct answer is D.It shifts from matter-of-fact to regretful.
Explanation:
We noticed that in the Story called "A Decade", the person who spoke, began with a recounting of the incidents of his life in a matter-of-fact way. Then, he tells some things that he had experienced; especially the one he had with his teacher. At the end of the text, the tone turned to be of deep regret.
