The correct answer is A.
Peter the Great was a Russian tsar and he governed the empire from 1682 until his death in 1725. Apart from the territorial expansion of the empire, he leaded a cultural revolution based on the Enlightment principles and aiming to substitute old structures from the medieval era that were still present in the Russian society and politics. His modernization policies have had a crucial impact in Russia, and many current Russian institutions have their origins in his ruling period.