Get Reused to It
In the last days I've highlighted what I judge some of the best moments from Terrytoons, but there are several reasons why Terry Studio was considered a B one.
The animation was nothing worth of note, with exceptions being the works of Tytla, Vinci and Tyer. The sound effects (I consider them one of the most important elements in a cartoon) were of the lowest quality one can imagine(no matter if a character falls from the top of a mountain right into a lake or from a diving board into a pool: you'll always hear that same darn "splash"), musical score was rarely good (the posts I've made show some very good exceptions).
There would be more but the main reason to classify Terry as a B Studio was the reuse of animation (and even soundtrack). So you can see the very same sequence originally made for a 30s cartoon reused even in the 50s (!!).
Judge for yourselves with what I consider good examples.
Catnip Capers (1940)
Somewhere in Egypt (1943)
King Tut's Tomb (1950)
Well, I'll be seein' ya,