Charles: During recessions unemployment typically rises. Thus, during a recession air pollution due to automobile exhaust decreases, since fewer people commute in cars to jobs and the air are used less.
Darla: Why think that air pollution would decrease? During a recession fewer people can afford to buy new cars, and cars tend as they get older.
What this question is testing
Your task
Describe how the argument proceeds — the technique it uses to reach its conclusion.
Common trap
Answers that describe a method the argument doesn't actually use.
Winning move
Track the role each statement plays, then match that to the choice describing the same moves.
Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.