It’s the one that has (page20) at the end
The topic sentence of the following paragraph would be A. Chess is a challenging game that can be a lot of fun once someone learns to play.
I would say the correct answer is <span>D. a concise statement of a principle containing a personal truth or observation, usually in a clever tone.</span> Aphorisms are short and effective statements. Their greatest strength is their laconic succinctness, which also makes them memorable. Their topics usually come from philosophy and everyday human experience.