The correct answer is C: Resource Registry and Business Automation Navigator. The Foundation Pattern provides the baseline platform services that are included with Cloud Pak for Business Automation deployments. IBM deployment guidance identifies Business Automation Navigator and Resource Registry as foundation components that are installed always. Navigator provides the unified business-user access layer for content and automation applications, while Resource Registry supports discovery and registration of automation resources across the platform. Business Automation Studio and Application Engine are foundation-related components, but their installation depends on the selected capability pattern or optional component. Business Automation Insights is also not always installed; it is included only when selected directly or required by a combined capability that activates insights/event-processing services. Therefore, the always-present foundation pair is Resource Registry and Business Automation Navigator. References/topics: CP4BA Foundation Pattern, Resource Registry, Business Automation Navigator, capability-pattern dependencies, production deployment planning.