The term "Sabarmati treaty" is not a widely recognized historical event name. However, given that Sabarmati was the location of Mahatma Gandhi's ashram and a center for various movements, the options suggest a resolution or agreement related to social reform or political action emanating from there. Option C aligns most closely with the principles and activities commonly associated with Gandhi and the movements based at Sabarmati Ashram, focusing on social equality (anti-discrimination for lower caste workers), community action (team of volunteers), and communal harmony (Hindu Muslim unity). These were core tenets promoted from Sabarmati.