Final answer:
To order both playlist names and track names in descending order, the correct SQL query would be option (b): SELECT PlaylistName, TrackName FROM PlaylistTrackNames ORDER BY PlaylistName DESC, TrackName DESC.
Step-by-step explanation:
To query the playlist names and track names both in descending order from the created view PlaylistTrackNames, you should select the relevant columns and add an ORDER BY clause that specifies both columns in descending order. The correct SQL statement for this would be:
SELECT PlaylistName, TrackName FROM PlaylistTrackNames ORDER BY PlaylistName DESC, TrackName DESC;
This corresponds to option (b) and ensures that the results returned will first be sorted by PlaylistName in descending order and then by TrackName in descending order within each playlist grouping.