The correct answer is A. Avoid collaborating with others, so as not to be distracted.
Explanation
Study methods are different strategies to be prepared for an exam, test or presentation, among the main study methods are: creating a study routine, keeping distractions away, studying in a team with peers, avoiding memorization and prioritizing deepening of topics. Specifically, studying in a team is a method widely used in school and university due to its effectiveness because, in a group, students build their knowledge together, strengthening their own and their classmates' shortcomings. According to the above, the method that will NOT help Chethen to prepare for the next half period is A. Avoid collaborating with others, so as not to be distracted. Because he should prioritize interacting with his peers to study and strengthen his educational process. So, the correct answer is A. Avoid collaborating with others, so as not to be distracted.