What were "soviets"?

A) military units used by the Bolsheviks
B) the intellectual leaders of the revolution in Leninism
C) the demands for reform made in the February Revolution
D) councils originally established during the Revolution of 1905
E) assassination orders issued by Lenin and Stalin

Soviets

Elected councils that were formed by workers and soldiers in Russia, notably during the Revolution of 1917, leading to the formation of the Soviet Union.

Councils

Assemblies or meetings called for consultation, advice, or decision-making, often within a religious, political, or social context.

Revolution of 1905

A wave of mass political and social unrest that spread through the Russian Empire, including strikes, peasant unrest, and military mutinies, leading to constitutional reform.