Concept:The question asks about the author of a book on farmer exploitation in colonial India.
Explanation:Jyotirao Phule wrote "The Cultivator's Whipcord" to highlight the oppression of farmers by moneylenders and landlords.
He was a social reformer who also worked for caste equality and women’s education.
Narayana Guru was a spiritual leader from Kerala, not linked to this book.
Vandana Shiva is a modern environmental activist; she did not write it.
E.V. Ramasamy Naicker focused on atheism and social justice but not this work.
Thus, only Jyotirao Phule matches the known authorship.
Answer:C. Jyotirao Phule