What was the name of the first Federal Chancellor of the Federal Republic of Germany?

EDITORIAL LEARNING AID

Why is this answer correct?

Konrad Adenauer was the first Federal Chancellor of the Federal Republic of Germany, from 1949 to 1963. Willy Brandt and Helmut Schmidt governed only in the 1970s, and Kiesinger from 1966 to 1969. None of them stood at the beginning of the Federal Republic.

First Federal Chancellor: Konrad Adenauer, 1949 to 1963.

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