Explanation
Success measures are the criteria that are used to evaluate the performance and value of a solution. They are derived from the business objectives and the expected benefits of the project. They help to determine whether the solution meets the needs and expectations of the stakeholders, and whether it delivers the desired outcomes and benefits. Success measures can be quantitative or qualitative, and they should be specific, measurable, achievable, relevant, and time-bound (SMART).
The other options are not correct because they are not the outputs of the initial analysis that the BA has been conducting. Business needs are the problems or opportunities that the organization wants to address with the project. Solution requirements are the capabilities and qualities that the solution must have to meet the business needs. Solution limitations are the constraints or risks that affect the solution's performance or value.
These aspects are more related to the scope and design of the solution, which are not yet defined at this point.
References:
[A Guide to the Business Analysis Body of Knowledge (BABOK Guide), Version 3], Chapter 6:
Strategy Analysis, pp. 134-135, 140-141; Chapter 7: Requirements Analysis and Design Definition, pp.
152-153, 158-159, 164-165; Chapter 8: Solution Evaluation, pp. 178-179, 184-185.
[Business Analysis for Practitioners: A Practice Guide], Chapter 3: Needs Assessment, pp. 46-47; Chapter 5: Requirements Analysis and Design Definition, pp. 123-124, 133-134, 140-141; Chapter 6:
Solution Evaluation, pp. 157-158, 163-164.