Explanation
Changes to requirements may happen at any time in the business analysis processes and throughout the project. When these changes happen later in the process, it becomes more difficult to accept, communicate, and manage those changes.
Answer B is incorrect. Changes may happen at any time, not just at the beginning of the processes.
Answer A is incorrect. Changes don't just happen at the end of the business analysis processes.
Answer D is incorrect. Changes may happen at any time, not just after the business analysis processes.