The correct option is A composed their verses in the languages understood by their followers
The Bhakti movement refers to the theistic devotional trend that emerged in medieval Hinduism. One of the main feature of this movement was the saints preached through local or regional languages and travelled from place to place to spread the religious message. Ramanuja, Nimbarka, Ramananda, Chaitanya, Kabir, Guru Nanak, Mirabai were some of the popular saints of this movement.