Question

what was a cause of the russian revolution?
a large, restless middle class
an autocratic monarchy
victories on the battlefield in world war i
a powerful legislature

Explanation:

The Russian Revolution was spurred by the autocratic rule of the monarchy. The Tsarist regime's lack of political reform, economic mismanagement, and suppression of the populace led to widespread discontent. The middle - class was not the main driving force, Russia faced defeats in World War I rather than victories, and the legislature was weak under the autocratic monarchy.

Answer:

an autocratic monarchy