You are a Microsoft Fabric Analytics Engineer working on optimizing a complex DAX (Data Analysis Expressions) query within an enterprise-scale semantic model. The query is causing significant delays in report generation due to a large number of calculations. Your goal is to improve the query's performance using DAX Studio, considering the constraints of cost, compliance, and scalability. Which of the following steps would you take first to effectively identify and address the performance bottlenecks? (Choose one option.)