Germany’s leaders issued a single currency to promote a strong unified German economy.
Step-by-step explanation:
German reunification occurred in 1990 where the leaders of the East Germany and the West Germany signed a treaty meant to establish the monetary and economic matters of the two countries.
Since they were separate countries, each country had its own currency and the decision was reached to only use West Germany currency. The reason was that West Germany currency Deutsche Mark had a very good reputation and was fairly stable. The treaty resulted in both countries using each other's financial policies and legislature which strengthened the political union.