A yes, the Bolshevik Coup took place on Nomver 7 (October 25 in Old Style Calendar) 1917.
B is wrong because at that time was Alexander III, he died in 1894 and the his son Nicholas II became czar, but undoubtedly the famine was one of the first signs of the population's dissatisfaction with the Romanov family -- the czarian family.
C yes, although the general condition of the people, mainly middle class, improved, there was still the problems of managing the government as a whole, by refusing to stablish a parliament, the Duma, also the problems in managing the famine, declaring War against Japan and entering World War I.
D would be case but it is not explictly expressed in the text, the text mentions that if Nicholas had stablished the Duma with real governing powers this would at least halted the Soviet Revolution. The text also shows that Nicholas fundamentally believed that God had given him power to rule over Russia.
E is wrong because the text makes it explicit that he had enjoyed more power than no czar had ever had before. Surely his whole project of defeating Capitalism around the planet never came to be but it does not deny the fact that he was powerful.
It cannot be F because there is no mention of Stalin in the text or any comparison of Lenin and Stalin.