Explanation
Brainstorming is an elicitation technique that involves generating a large number of ideas or options for solutions in a creative and collaborative way. Brainstorming is suitable for eliciting requirements from a large group of stakeholders, as it allows them to share their perspectives, opinions, and suggestions without any judgment or criticism. Brainstorming also helps to produce a broad set of options for solutions, as it encourages the participants to think outside the box and to build on each other's ideas. Brainstorming can be done in various formats, such as face-to-face, online, or hybrid, and can be facilitated by a business analyst or a neutral moderator. The other options are not elicitation techniques that can achieve the same goal as brainstorming. Business rules analysis is a technique for identifying, documenting, and validating the rules that govern the behavior and operation of a business or a system. Benchmarking is a technique for comparing the performance, processes, or practices of an organization or a system with those of other organizations or systems that are considered to be the best in the industry or the domain. Data flow diagrams are a technique for modeling the movement and transformation of data within a system or a process. References:
9 Elicitation Techniques Used by Business Analysts - Tips and Guidance
CBAP/CCBA preparation questions - The Functional BA
Business Analysis: The Elicitation Process - UniversalClass
Elicitation techniques in business analysis - PMWorld 360 Magazine