Conversation so far:
Did they move from ABC to Casablanca?
The Tops departed Motown for ABC-Dunhill.
Why  did they depart motown?
In 1972, it was announced that the entire company would move west and that all its artists had to move as well.
So the tops moved west then?
The Tops departed Motown for ABC-Dunhill.

Question: How did they do with ABC?
Self-contained rewrite: How did the Tops do with ABC?