正解:B
A classification schema is a technique that helps to organize and categorize requirements based on common characteristics or attributes. A classification schema can facilitate effectively understanding the different types of requirements by providing a clear and consistent way to communicate, prioritize, analyze, and manage them. A classification schema can also help to identify gaps, overlaps, and dependencies among requirements. Reference: BABOK Guide, Version 3, Chapter 10: Techniques, Section 10.6: Classification Schema, Page 387; Chapter 6: Requirements Life Cycle Management, Section 6.2: Prioritize Requirements, Page 146.