The correct answers are C, D, and E.
Kiev is now the capital and largest city of Ukraine, but in the past it was part of the Russian Empire since 1667 to 1917. It was also part of the Soviet Union since 1921 to 1991, when the modern Republic of Ukraine was formally established.
Russia is a Euroasiatic country, part of its territory -that includes Moscow and Saint Petersburg- is in Europe and part of it is in Asia -which includes Siberia-.
Many rivers, like the Lena and Yenisei rivers, flow north into the Arctic Ocean.