Which statement is true about InnoDB persistent index statistics?

A: Updating index statistics is an I/O expensive operation. B: Index statistics are calculated from pages buffered in the buffer pool for tables with InnoDB storage engine. C: Setting innodb_stats_auto_recalc=ON causes statistics to be updated automatically when a new index is created. D: Execution plans based on transient index statistics improve precision when innodb_stats_persistent_sample_pages is increased. E: Increasing innodb_stats_persistent_sample_pages determines higher pages scanning speed, at the cost of increased memory usage.