Nonviolent resistance (NVR or nonviolent action) is the practice of achieving goals such as social change through symbolic protests, civil disobedience, economic or political noncooperation, satyagraha, or other methods, while being nonviolent.
All except for the monopolies
From the year of 1760 to 1820 or 1840 (one those could be your answer so.
1820years - 1760years =
60years
or if its the other year (1840)
Then try going with 1840years - 1760years = 80 years
So, either 60 years or 80 years would most likely be your answer! (If that's one of your options )