Answer:
B) with the main character as an 85-year old man, deep in thought about everything he has been through over the course of his life.
Step-by-step explanation:
It would make the most sense to start the story like this in order to show that the story will be about this one character who is reaching the end of his life and who will consequently evaluate and ponder the main events that he experienced in his life.
In fact, one of the greatest novels of all time, In search of lost time, by Proust, in basic terms begins this way as the narrator ponders the reminiscence that a single sensations brings about, thus setting forward a seven book long narrative about his long life.