In order to improve the academic performance, a class of students became ill and insisted on studying in the classroom, but in the college entrance examination, none of the students in the class was admitted to key universities. It can be seen that the long study time leads to poor test results. Which of the following, if true, would most weaken the argument? ? ["If you don't keep studying, the test scores in this class may be even less satisfactory.", 'The class has a good learning attitude.', 'Taking a break will not delay exam results.', 'The class does not perform well in the exam.']