Answer:
B. The author may have chosen to end the story this way to answer all of the questions
the reader may have about who was in the picture.
Step-by-step explanation:
According to the line from. A Cold Greeting, the most likely reason the author chose to end the story by mentioning that the picture was taken a week before his death and without a mustache is that he wanted to clear all doubts and answer the question of who was in the picture.