Final answer:
The Brahmins were responsible for all aspects mentioned in the options except for developing the class (or caste) system.
Step-by-step explanation:
The Brahmins were responsible for all aspects mentioned in the options except for b)Developing the class (or caste) system. The Brahmins were the highest class in the caste system and held significant authority. They acted as mediators between the gods and humans through animal sacrifices, provided guidance on dharma, and played a crucial role in the development of bhakti, or devotional Hinduism.