Answer:
The organization used is D. chronological order.
From the option given for the question:
Flash-forward: If the story jumps into a temporary sequence that is going to happen in future, like foreseeing it, then this order of story is called flash-forward.
Flashback: These kinds of stories jumps back to open the cause of any present action that is happening.
Problem-solution: These stories have no organization. The author proposes solutions after identifying problems in an argumentative fashion to the readers.
Chronological: If an author writes a story in the same order as it happened, then it is the chronological order.
Step-by-step explanation: