Lacking a political voice,
Invisible to the middle class,
Jobless due to automation,
ALL OF THE ABOVE
I would have to guess that the correct description of revolution is where the people are not getting what the need or deserve so the people revolt toward the government, possibly overthrowing it, and create the government with its wants and needs. The outcome is the creation of the new government or monarchy with what the people want.
China lost the Sino-Japanese War.
The answer is C. Central Asia