Question

what practice of hinduism is the buddha criticizing?
ot by birth does one become an outcast, not by birth does one become a brahmin. by deeds one becomes an outcast; by deeds one becomes a brahmin. there are two ends not to be sought by a seeker of truth. the first is the pursuit of desires ... and the second is the pursuit of hardship. the middle way avoids of these ... and leads to peace, insight, full wisdom, and nirvana.\ --buddha
reincarnation
caste system
brahmin priests
nirvana

Explanation:

The quote "Not by birth does one become an outcast, not by birth does one become a Brahmin. By deeds one becomes an out - cast; by deeds one becomes a Brahmin" directly challenges the Hindu caste system which assigns social status based on birth.

Answer:

B. Caste System