Nice one! Although Kermit is a bit of a trick question since he was originally on Sesame Street and started The Muppets because he was popular. “(It’s not easy) Bein’ Green” was a song from Sesame Street, for instance.
I know he was in both, but I chose Sesame Street because I saw him there first. To make it clearer, you could remove Kermit from the list. The quiz insists that he was on one program or the other.