An educational institution surveyed the study habits and language performance of all students in a high school, and found that compared with students who like to do a lot of exercises, students who like to read a lot of extracurricular readings have better language performance. Reading improves students' language performance more than doing exercises. Which of the following, if true, would best support the agency's views? ["Chinese exams have high demands on students' reading volume.", 'The reason why students do a lot of exercises is because their language performance is poor.', 'Students with excellent grades have the time and energy to read extracurricular materials.', 'Other institutions did similar research in elementary and junior high schools and came to the opposite conclusion.']