(C) Raja Rammohan Roy published Sambad Kaumudi from 1821.
The passage explicitly states: "Rammohun Roy published the Sambad Kaumudi from 1821." Ram Chaddha published Istri Dharm Vichar, Rashsundari Debi wrote Amar Jiban, and Tarabai Shinde wrote about widows' lives — none of them published Sambad Kaumudi.