How should you perform reads from Cloud Spanner for this application?

Your application takes an input from a user and publishes it to the user’s contacts. This input is stored in a table in Cloud Spanner. Your application is more sensitive to latency and less sensitive to consistency.

How should you perform reads from Cloud Spanner for this application?
A . Perform Read-Only transactions.
B . Perform stale reads using single-read methods.
C . Perform strong reads using single-read methods.
D . Perform stale reads using read-write transactions.

Answer: D

Explanation:

Reference: https://cloud.google.com/solutions/best-practices-cloud-spanner-gaming-database