A multinational company wants to deploy a low-latency, high-throughput data processing solution that synchronizes data across their global branches. They also have strict regulatory requirements for data locality. What's the most suitable GCP service?

*Explanation:* To meet the multinational company's requirements for a low-latency, high-throughput data processing solution with data synchronization and strict data locality policies, the best choice is **Cloud Spanner** with a multi-region configuration and data locality policies in place. Cloud Spanner provides the ability to configure data distribution for specific regions, ensuring compliance with regulatory requirements while maintaining low latency and high throughput. The other options do not provide the same combination of features and capabilities required for this scenario.