The correct answer is:
They allowed invading foreign armies access to northern India.
They only seemed to get worse when the rebellion was carried out to make it better.
Answer:
They are the primary source of revenue for local governments.
Explanation:
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I'm guessing you mean a historical example, but one could be that of Martin Luther King's marches and protests. Or the march of free independent women in the 1920's that eventually got them their right to vote.