Which one of the following is a very significant aspect of the Champaran Satyagraha?

The Champaran Satyagraha (1917) was Mahatma Gandhi's first experiment with Satyagraha in India. It was launched to address the grievances of peasants in Bihar who were forced by European planters under the 'Tinkathia system' to cultivate indigo on 3/20th of their land. The most significant aspect of this movement was the joining of peasant unrest to the Indian National Movement. This marked a fundamental shift in the struggle for independence, transitioning it from an urban, middle-class intellectual movement to a mass-based movement that included the rural peasantry. While the movement was localized, its success provided Gandhi with a national platform and demonstrated the efficacy of non-violent resistance.