The two details that help develop the story into a satire are:
B. Gortsby changes his view after finding a bar of soap on the ground
D. Gortsby is very cynical and distrusting of the young man he meets
These details emphasize the satirical elements of human behavior, particularly how quickly people can shift their perceptions based on superficial evidence, and the cynical attitude that reflects societal tendencies to judge others harshly.