Answer: D, a story written about the history of their family.
A - "We were on the verge of bankruptcy..." + "Vibrant and Prosperous"
"On the verge" related to being on the edge, like being close to the end of a cliff. Those words invoke imagery
Vibrant means bright and thriving, and prosperous means rich, successful and flourishing. Those words are pretty charged!
B - "We were a sinking ship" + "We repaired our ship"
The person speaking compares the state of the town to a ship sinking
C - There is no example for parallelism
D - "Five years ago...Five years ago...Five years later. I am your mayor...as the mayor"
The speaker (who is the mayor) repeats the phrase "five years ago", putting emphasis on key ideas
I hope this helps you understand!
