Who among the following was the first Bhakti saint to use Hindi for the propagation of his message?

1. The question asks for the first Bhakti saint to use Hindi (or its early form, Hindavi) extensively for the propagation of his religious message. 2. The Bhakti movement saw saints composing devotional works in vernacular languages to reach the masses. 3. Ramananda (Option C), a 14th-15th century Vaishnava saint, is widely credited with popularizing the Rama cult in North India and making devotionalism accessible to all sections of society, irrespective of caste. 4. Significantly, he moved away from the traditional Sanskrit and is considered one of the pioneers in using the vernacular language (Hindi/Hindavi) for his teachings and compositions, thereby broadening the reach of the Bhakti message. 5. While Kabir (B) (a disciple of Ramananda) and Dadu Dayal (A) also used forms of Hindi, Ramananda is generally acknowledged as the earlier figure who initiated this trend prominently. 6. Tulsidas (D) composed the Ramcharitmanas in Awadhi (a dialect of Hindi) much later (16th century).