Your customer has implemented a solution that uses Cloud Spanner and notices some read latency-related performance issues on one table. This table is accessed o...

Your customer has implemented a solution that uses Cloud Spanner and notices some read latency-related performance issues on one table. This table is accessed only by their users using a primary key. The table schema is shown below.
You want to resolve the issue. What should you do?

A. Remove the profile_picture field from the table. B. Add a secondary index on the person_id column. C. Change the primary key to not have monotonically increasing values. D. Create a secondary index using the following Data Definition Language (DDL):