A game development company is looking to build a globally distributed multiplayer online game. They need a real-time database that allows for easy and fast querying, supports complex hierarchical data models, and is scalable. Which GCP service would you recommend?

*Explanation:* The correct choice is C. Firestore in Native mode. Firestore in Native mode supports real-time updates and complex hierarchical data models, making it suitable for a globally distributed online game. Option A, Cloud Spanner, while supporting global distribution, may be overkill for this use case. Option B, Firestore in Datastore mode, does not support real-time updates. Option D, CloudSQL, is a relational database and not well-suited for real-time updates. Option E, Cloud Bigtable, is not suitable for complex hierarchical data models.