Final answer:
Tsar Nicholas II left Rasputin, Kerensky, and the Duma as key figures during WWI.
Explanation:
When Tsar Nicholas II took over command of the army during WWI, he left Rasputin with significant influence over the royal family due to his relationship with Tsarina Alexandra. Kerensky, a key figure in the provisional government that took power in March 1917, played a role in the political changes during the Russian Revolution. Tsar Nicholas II left the Duma, Russia's legislative body, under the control of the Provisional Government after his abdication in 1917.
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