Which senator does Berlin not have?

EDITORIAL LEARNING AID

Why is this answer correct?

Relations with foreign states are a matter for the federal government under Article 32(1) of the Basic Law, which is why Berlin has no Senator for Foreign Relations. Senators for Finance, the Interior and Justice, by contrast, are part of Berlin's state government, because these are the state's own responsibilities.

Foreign policy is a federal matter, in Berlin too.

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