The correct option is C Jyotibha Phule
Explanation:
Gulamgiri and Sarvajanik Satyadharma books were written by Jyotibha Phule. He started the Dalit Movement because he was against upper class Brahminical domination. Satya Shodhak Samaj was established by him in 1873. to liberate the Shudras and Untouchable castes from exploitation and oppression