Each Group of Sentences Can Be Arranged and Written as a Paragraph

Each group of sentences can be arranged and written as a paragraph. Select the letter of the sentence that would be the best topic sentence.
-_____________

A) Besides being enjoyable and absorbing, playing chess teaches many skills that are useful in everyday life.
B) By requiring planning ahead and strategizing, chess teaches the thinking skills many schools and employers want.
C) Chess helps build math skills because it involves practicing problem solving.
D) Playing chess involves sportsmanship, so the game helps build strong character.