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A developer must troubleshoot to pinpoint the causes of performance issues when a custom page loads in their org. Which tool should the developer use to troubleshoot query performance?
Correct Answer: D
* Why Developer Console? * TheDeveloper Consoleprovides tools to troubleshoot query performance, including the Query Plan tool. * The Query Plan tool evaluates SOQL query performance and provides insight into query costs and optimization. * Why Not Other Options? * A. Setup Menu: Used for administrative tasks, not performance troubleshooting. * B. Visual Studio Code IDE: Useful for development, but does not offer query performance tools. * C. AppExchange: Provides apps but does not directly help with query troubleshooting. References:Query Plan Tool:https://developer.salesforce.com/docs/atlas.en-us.220.0.salesforce_console.meta/salesforce_console/salesforce_console_query_plan.htm