When were the National Socialists in power in Germany?

EDITORIAL LEARNING AID

Why is this answer correct?

The Nazi party under Adolf Hitler ruled from the seizure of power on 30 January 1933 until the capitulation in 1945. 1888 to 1918 was the era of the German Empire, and 1949 to 1963 the Adenauer era in the Federal Republic. 1921 to 1934 does not describe any period of German history.

Nazi period: 1933 to 1945, twelve years of dictatorship.

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