All the choices happened and led to the October Manifest. We will put them down to make it easier for us to understand.
In 1825 (D). A secret society known as the Decembrists was formed led revolution against Nicholas I
Then in 1861 (B. )Alexander II had the freed serfs and distributed lands among them hoping that it would develop an economic development
In 1881 (C. )Jews were attacked, and Alexander II was blamed for the assassination.
Then, lastly in 1905 (A.) Father Gapon and hundreds of protester were killed when they marched to the Winter Palace
Because of this, the October Manifesto was crafted by Nicholas II which gives people more freedom in expression as well as other aspects.