What was a cause of the Russian Revolution?

Widespread suffering under autocracy—a form of government in which one person, in this case the czar, has absolute power

•  Weak leadership of Czar Nicholas II—clung to autocracy despite changing times

•  Poor working conditions, low wages, and hazards of industrialization

•  New revolutionary movements that believed a worker-run government should replace czarist rule

•  Russian defeat in the Russo-Japanese War (1905), which led to rising unrest• Bloody Sunday, the massacre of unarmed protestors outside the palace, in 1905

•  Devastation of World War I—high casualties, economic ruin, widespread hunger

•   The   March Revolution in 1917, in which soldiers who were brought in for crowd control ultimately joined labor activists in calling “Down with the autocracy!”

Explanation:  Here are some of the cause that I learned.

Widespread suffering under autocracy—a form of government in which one person, in this case the czar, has absolute power.Weak leadership of Czar Nicholas II—clung to autocracy despite changing times. Poor working conditions, low wages, and hazards of industrialization.New revolutionary movements that believed a worker-run government should replace czarist rule. Russian defeat in the Russo-Japanese War (1905), which led to rising unrest.

a memoir is the correct answer