Your organization is using Cloud Spanner for its transactional data. You want to ensure that you have the highest possible read and write throughput. What should you consider optimizing? (Choose 2)

*Explanation:* A. Increasing the number of Spanner nodes can provide higher throughput, so it's correct. B. Interleaved tables might improve data locality but don't necessarily optimize throughput, so it's incorrect. C. Increasing the size of the Spanner instance doesn't directly affect Spanner's throughput, so it's also incorrect. D) Using Partitioned DML for writes can enable more efficient writes, so it's correct. E) Enabling the slow query log is for diagnostics and doesn't optimize throughput, so it's incorrect.