An Azure AD tenant is connected to 10 Azure subscriptions. You need a centralized way to monitor user activity across all subscriptions. Which service should you use?

A Log Analytics workspace is the correct choice because it provides a centralized repository for logs and metrics from various Azure resources, including activity logs from multiple subscriptions. You can configure diagnostic settings for each subscription to send their activity logs to a single Log Analytics workspace, enabling consolidated monitoring and querying of user activity across all 10 subscriptions. Azure Application Insights Profiler is for performance analysis of applications, not general user activity monitoring across subscriptions. Access reviews are for managing and certifying user access, not for monitoring activity. Activity log filters are used within individual activity logs and don't provide a centralized view across multiple subscriptions.