Great quiz anyway!
Your map looked like the first one, which is the German Confederation
This German Empire (48-49) can be seen as an early try for German Unification, but it was struck down by the two major states, Austria and Prussia. After then the German Federation was restored, and lived on until 1866, when the North German Confederation was created.
So when talking about the year 1848 specifically, it's both the German Federation and the German Empire