Your company uses Cloud Spanner for a mission-critical inventory management system that is globally available. You recently loaded stock keeping unit (SKU) and ...

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 hotspots 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.