Option A is Incorrect: The Eka Movement was initially supported by Congress and Khilafat leaders, but the Congress withdrew its support when the movement adopted militant tactics under the leadership of Madari Pasi. Conversely, the Bardoli Satyagraha was deeply integrated with Congress leadership from its inception and was spearheaded by Sardar Vallabhbhai Patel. Option B is Incorrect: The Eka Movement was a grassroots peasant movement directed *against* oppressive taluqdars and zamindars, led by Madari Pasi, a low-caste peasant leader. The Bardoli Satyagraha was primarily a movement of landowning peasants (such as the Patidars) facing economic hardship, rather than a movement of landless labourers. Option C is Correct: The Bardoli Satyagraha (1928) was a direct campaign against an arbitrary 22% enhancement of land revenue by the British Bombay Presidency government. The Eka Movement (1921–1922) was primarily a protest against the excessive and illegal extraction of rents (often exceeding 50% of the recorded rent) and the oppression by *thekedars* (contractors) and landlords. Option D is Incorrect: The Eka Movement took place in the Awadh region of the United Provinces, specifically in districts like Hardoi, Bahraich, Barabanki, Sitapur, and Lucknow, not Varanasi or Mirzapur. The Bardoli Satyagraha occurred in the Bardoli taluka of the Surat district in Gujarat, not Saurashtra. Therefore, Option C is the correct answer.