A: It defines the nature of a solution that meets that need: This is a correct activity of enterprise analysis, as it involves defining the scope, objectives, and requirements of the solution that will address the business problem or opportunity.
B: It identifies business needs, problems, or opportunities: This is a correct activity of enterprise analysis, as it involves understanding the current state of the organization, its goals, and the external and internal factors that affect its performance.
C: It justifies the investment necessary to deliver that solution: This is a correct activity of enterprise analysis, as it involves assessing the costs, benefits, risks, and feasibility of the proposed solution and presenting a business case that supports the decision to implement it.
D: It manages and expresses requirements to a broad and diverse audience: This is an incorrect activity of enterprise analysis, as it belongs to another knowledge area, which is requirements communication and management. This knowledge area involves ensuring that the requirements are understood, agreed upon, and controlled by all the stakeholders throughout the project lifecycle.