The roots of classical India included
(A) the Aryan written language, or Sanskrit.
(B) the egalitarian Aryan society.
(C) Aryan agricultural knowledge.
(D) a society united by jati.
(E) Vedic traditional literature.
(A) Sanskrit is the language used in most of India, from which things such as the word Chakra belongs to. The language of Hinduism, so it seems the most likely.
