Which detail would be best to add after sentence 5 to support the author's claim that taking part in after-school activities helps improve students' concentration skills? A. According to students who were interviewed by a school magazine, students who took part in after-school activities were better able to focus on studies than they would otherwise. B. According to a recent survey by the U.S. Department of Education, students preferred to take part in after-school activities in order to spend time with their friends. C. According to a national poll, a majority of students at schools like to take part in various after-school activities because they have fun while competing with their friends. D. According to a survey by the U.S. Department of Education, taking part in after-school activities helped increase student confidence and focus while playing sports.
