Wie viele Bundesländer kamen bei der Wiedervereinigung 1990 zur Bundesrepublik Deutschland hinzu?

How many federal states were added to the Federal Republic of Germany during reunification in 1990?

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Correct answer: B, 5

This is one of the 300 general questions in the official BAMF catalogue. In the real test, 30 of them are drawn at random, plus 3 questions about your federal state.