What Was the Key Function That Assured the Authority of the Brahmins

What was the key function that assured the authority of the brahmins in the southern kingdoms?

A) Only the brahmins were capable of performing the rituals and sacrifices that obliged the gods to intervene in human affairs.
B) As the warrior elite, the brahmins controlled the military affairs of the southern kingdoms.
C) As the commercial class of India, the brahmins were entirely responsible for the economic prosperity of the southern kingdoms.
D) The brahmin class provided the members of all of the dynasties of the southern kingdoms.