Which of these is a district (Landkreis) in Baden-Württemberg?

EDITORIAL LEARNING AID

Why is this answer correct?

The Neckar-Odenwald district lies in the north of Baden-Württemberg and belongs to this federal state. Mecklenburgische Seenplatte is in Mecklenburg-Western Pomerania, Nordfriesland in Schleswig-Holstein and the district of Altötting in Bavaria.

Neckar and Odenwald: both are found in Baden-Württemberg.

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