Answer:
Correct answers are:
Leaders in East Germany were replaced.
East and West Germany were reunified.
Germany developed a powerful economy.
Step-by-step explanation:
First option is not correct as fall of the Berlin Wall didn't directly affected Hungary. The changes in that country were result of internal reforms and elections of 1990.
Three next options are correct as East and West Germany were unified in one country, with new regime, while the country started strengthening furthermore its economy.
Last option is not correct as actually people from East Berlin were moving to the western part of the city.