Answer:
A. The workers suffered from long hours
Step-by-step explanation:
The Russian Revolution of 1917 which was carried out against the government of Tsar Nicholas II and its capitalist mode of governance, was based on the premise that the peasants and working-class people are getting little pay for their work done, and it the employers that are gaining the most.
This is evident in the fact that the class of people that joined Vladimir Lenin's revolutionary movement were mostly the peasants and working-class categories.
Hence, in this case, the correct answer is "The workers suffered from the long hours."