The author most likely thinks that the company has exaggerated its two-day shipping promise (B).
Satire means that the author uses wit, sarcasm, or inony (in this case, through a narrative of events) to discredit a person or an idea.
Here, the author is adding to their story several circumstances which show how they do not believe in strict two-day shipping:
These elements, one could argue, create a sort of worst-case scenario, which enables to author to disparage the company's two-day shipping promise.