The more demand there is for something, the easier it is to sell. Any junkyard will buy a used car that is less than ten years old, because the parts can easily be resold. However, because there is little demand for car parts that are ten years old or older, junkyards tend easier to sell than are cars that are ten years old or older.
What this question is testing
Your task
Find the assumption the argument requires in order for its conclusion to hold.
Common trap
Answers that would help the argument but aren't strictly required (sufficient, not necessary).
Winning move
Negate each choice — the right one breaks the argument when negated.
Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.