Since the time when the Romans first settled on the Danube River and built one of their most important central European forts  , Vindobona, the city we now know as Vienna, has played a very important role in European history. Austria grew up around the city and developed into a strong empire  . The capital became a famous place during the rule of the Habsburg dynasty. Today, Vienna is one of the most popular tourist spots in Austria as well as a major center of modern business and culture. Many different cultures have _ their cultural identities to produce the amazing Viennese culture. It is said that the most beautiful German is spoken in this old city. A city of music, cafes, waltzes, parks, cakes, and wine -- that's Vienna. Famous composers such as Mozart, Beethoven and Schubert made Vienna into a city of music. Vienna also has a lot to offer in art and architecture. Yet the bars and clubs make a trip to Vienna an unforgettable experience. Vienna's cooking diversity is also impressive. Dumpling soup, tender boiled beef and apple rolls are typical Austrian dishes. The face of the city has changed time and again due to war, victory, defeat, the death of an empire and the birth of a republic, foreign occupation  , and the passage of time. Fortunately, the Viennese character --a strict devotion to the good life -- has remained solid. What can we know about Vienna in the past?
It used to be a business center. People there had beautiful voices. Austria developed around this city. There were some forts in this city.
Question: Since the time when the Romans first settled on the Danube River and built one of their most important central European forts  , Vindobona, the city we now know as Vienna, has played a very important role in European history. Austria grew up around the city and developed into a strong empire  . The capital became a famous place during the rule of the Habsburg dynasty. Today, Vienna is one of the most popular tourist spots in Austria as well as a major center of modern business and culture. Many different cultures have _ their cultural identities to produce the amazing Viennese culture. It is said that the most beautiful German is spoken in this old city. A city of music, cafes, waltzes, parks, cakes, and wine -- that's Vienna. Famous composers such as Mozart, Beethoven and Schubert made Vienna into a city of music. Vienna also has a lot to offer in art and architecture. Yet the bars and clubs make a trip to Vienna an unforgettable experience. Vienna's cooking diversity is also impressive. Dumpling soup, tender boiled beef and apple rolls are typical Austrian dishes. The face of the city has changed time and again due to war, victory, defeat, the death of an empire and the birth of a republic, foreign occupation  , and the passage of time. Fortunately, the Viennese character --a strict devotion to the good life -- has remained solid. What can we know about Vienna in the past?
A. It used to be a business center.
B. People there had beautiful voices.
C. Austria developed around this city.
D. There were some forts in this city.
Answer: