Which statement describes Delta Lake optimized writes?

A shuffle occurs prior to writing to try to group data together resulting in fewer files instead of each executor writing multiple files based on directory partitions.

Optimized writes logical partitions instead of directory partitions partition boundaries are only represented in metadata fewer small files are written.

An asynchronous job runs after the write completes to detect if files could be further compacted; yes, an OPTIMIZE job is executed toward a default of 1 GB.

Before a job cluster terminates, OPTIMIZE is executed on all tables modified during the most recent job.