"Not so good"

Jeopardy! just had a Grammar category. Three of the questions were okay (id'ing an adjective and a sentence fragment) and the one where the contestant had to id a preposition at least said "some" don't agree that you can end a sentence with it.

But this is iffy:

Necessary to complete the thought, the last three words of this sentence form a restrictive one of these: "I like men who bake bread"

- and they accepted "clause". Just plain old clause. (I suppose that there isn't any other restrictive clause other than the relative one, but still. "Restrictive clause"?)

And then (of course) they blithely say

It's best to use this voice, as in "Bob ate the pie". "The pie was eaten by Bob"- not so good.

Best? Just like that? No reasons, no context, nothing about information structuring - just "passive is bad".

Sigh. Alex, I'm so disappointed.