The correct answer is (c) Russia.
The Romanov dynasty was the imperial family of Russia from 1613 until 1917. They were a German family who came to power when Michael Romanov was elected Tsar of Russia in 1613. The Romanovs ruled Russia for over 300 years, during which time they oversaw the rise of Russia to become one of the great powers of Europe. The dynasty came to an end in 1917, when Tsar Nicholas II and his family were executed during the Russian Revolution.
The other options are incorrect. France was ruled by the Bourbon dynasty from 1589 until 1792, and then again from 1814 until 1848. Germany was ruled by the Hohenzollern dynasty from 1871 until 1918. Italy was ruled by a variety of dynasties over the centuries, including the House of Savoy from 1861 until 1946.