Business analyst competencies are commonly grouped into personal qualities, business knowledge, and professional techniques. Personal qualities include communication, analytical thinking, facilitation, influencing, and relationship-building. Business knowledge covers understanding the organisation, industry, strategy, finance, processes, and business context. Professional techniques include modelling, requirements engineering, stakeholder analysis, investigation techniques, and business case development. IT skills may be useful for some business analysts, especially those working on digital or software-enabled change, but IT skills are not one of the three main competency groups. Treating IT skills as a core group would narrow the business analyst role too much, because business analysis is concerned with business change, not only technology delivery. Therefore, option D is not one of the three competency groups.