France occupied Germany’s coal-rich Ruhr Valley in 1923 because Germany had fallen behind in reparations. Option A is correct.
The Occupation of the Ruhr marked a period of military occupation of the German Ruhr valley by France and Belgium between 11 January 1923 and 25 August 1925. The occupation was a reaction against the German Weimar Republic widely and usually defaulting on reparation payments at the beginning of the 1920s.
