The correct answer is C.
In the excerpt above, Scout is evoking the shooting of the rabid dog.
When Calpurnia, the Finch’s cook and housekeeper, sees the rabid dog walking down the streets, she calls Atticus first and then Miss Eula May, the town telephone operator, to tell her to warn the neighbour to stay our of the street.
This is why the street was completely deserted when Attichus finally shot the mad dog and put him out of his misery.