What should you do?

Your company uses Cloud Spanner for a mission-critical inventory management system that is globally available. You recently loaded stock keeping unit (SKU) and product catalog data from a company acquisition and observed hot-spots in the Cloud Spanner database. You want to follow Google-recommended schema design practices to avoid performance degradation .

What should you do? (Choose two.)
A . Use an auto-incrementing value as the primary key.
B. Normalize the data model.
C. Promote low-cardinality attributes in multi-attribute primary keys.
D. Promote high-cardinality attributes in multi-attribute primary keys.
E. Use bit-reverse sequential value as the primary key.

Answer: A, D