Yeah, C makes sense here. Log Analytics is designed for monitoring within Azure, offering dashboards and alerts out of the box. If the question wanted integration with something outside Azure, maybe B would fit better, but for native monitoring and analysis you want Log Analytics. Pretty confident on this, but let me know if you see it differently!
Why not B here? It streams logs out but doesn’t really have any tools for alerting or analysis on its own, so I’m thinking that’s not what the question means by "monitoring." Anyone using Event Hubs as the main monitoring destination for audit logs, or is everyone going with C?