Answer:
D. He is a complete stranger to the other characters.
Step-by-step explanation:
In "The Storyteller," by Hector Hugh Munro, the bachelor is a passenger in the same carriage on the train the aunt and the children are traveling. Thus, after the aunt tells a boring story to entertain the children, the bachelor gives an account of a "horribly good" girl called Bertha, which has an unexpected ending.