Compression is implemented in SQL Server at the object level. Each index or table can be compressed individually, and you have the option of compressing partitions within a partitioned table or index. You can evaluate how much space you will save by using the sp_estimate_data_compression_savings system stored procedure. Prior to SQL Server 2019, this procedure did not support columnstore indexes, or columnstore archival compression. Which of the following is best described by "Objects are compressed using the Microsoft XPRESS compression algorithm on the data. This type of compression is best used for data that is infrequently read, but needs to be retained for regulatory or business reasons. The CPU cost of decompression tends to outweigh any performance gains from IO reduction" ?