Answer: A) It connects Central Europe with Eastern Europe.
D) It is used for trade. It is used for transportation
Explanation: The Danube is one of the longest European river connecting Central and Eastern Europe and is therefore of strategic importance. In addition, the Danube is very important in European transport and therefore trade. Since ancient times, the Danube has been important for transport and trade, and is also important for agriculture and drinking water. The very position of the river is such that it enables the transport of goods and people, connecting important points in Europe. The Danube rises in Germany, in the Black Forest Mountains, and flows into the Black Sea in Danube Delta. In its course, the Danube flows through ten European countries.
