Your application's front-end is hosted on Compute Engine instances and you are using Cloud Spanner for your database. You need to secure the communication between the two, ensuring low latency and high throughput. What is the best way to achieve this?

*Explanation: The best way to secure the communication between your Compute Engine instances hosting the front-end and Cloud Spanner for the database while ensuring low latency and high throughput is to **Employ Private Google Access and always access Cloud Spanner through its private IP** (Option C. . This approach leverages Private Google Access to establish a secure, low-latency connection by accessing Cloud Spanner through its private IP address. Option A involves Cloud VPN tunnel, which may add unnecessary complexity. Option B introduces VPC Service Controls and Cloud Armor, which might add latency. Option D suggests Identity-Aware Proxy and Dedicated Interconnect, which is overkill for this scenario. Option E combines Network Peering and Private Service Connect, adding complexity that is not needed for this use case.*