Mayor: Periodically an ice cream company will hold a free ice cream day as a promotion. Showing up may not cost you any money, but it sure does cost you time. We learn from this that when something valuable costs no money you get overconsumption and long lines. Currently, those who drive the use of roads during rush hour. Then rush hour congestion will abate.
What this question is testing
Your task
Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.
Common trap
Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.
Winning move
Predict what a right answer must do, then test each choice against the conclusion-evidence gap.
Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.