Question: A university found that students who studied in groups performed better on exams than those who studied alone. Which of the following, if true, most strengthens this finding? Need Assignment Help? (A) Group study sessions were led by experienced tutors. (B) Students who studied in groups spent more time studying overall. (C) Group study sessions focused on collaborative problem-solving techniques. (D) Students studying alone reported higher stress levels before exams. (E) The majority of the university's top-performing students participated in group study sessions.