Which of the Following Slowed Hinduism from Becoming a Universalizing

Which of the following slowed Hinduism from becoming a universalizing religion?

A) Hinduism was intertwined with the varna system, which was specific to South Asia.
B) Hinduism was less accessible to a wider audience than Brahmanism.
C) Hinduism was supplanted in South Asia by Jainism.
D) Hinduism rejected written sacred texts in favor of oral tradition.