It has been said that authors who write in order to give pleasure cannot impart to their readers the truth of their subject matter. That claim cannot be true. If it were, one could determine the truthfulness of a book simply by looking at its sales figures. If the book were very least some of what is written in the book is not true.
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.