Which of these is a district (Landkreis) in Hesse?

EDITORIAL LEARNING AID

Why is this answer correct?

The Main-Taunus-Kreis lies in Hesse between Frankfurt am Main and Wiesbaden. The Ammerland belongs to Lower Saxony, Altötting to Bavaria and the Prignitz to Brandenburg.

Main-Taunus-Kreis is near Frankfurt – so it is in Hesse.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.