In what two ways were Indians grouped into castes

There are two bases of the Indian social division into castes. The castes system has been consolidated and fed by religious practices. Ancient Hindu texts speak about four castes  or profession: brahmins (priests), warriors, merchants and workers. Brahmins were at the top of society, the elite. The other source is simply social practice. There are still several groups that are seen as inferior , the "untouchables" just like the dalits; they perform the lowest and dirtiest jobs.    Though castes don´t exist formally in Indian law, they exist in reality and social and racial divisions run still deep in India.

Explanation:

d: social contract theory

question:  

the chart compares religious beliefs to us political party support.

religious beliefs and party support, 2012

this chart demonstrates that

a) more highly religious people supported the republican candidate, while more nonreligious people supported the democratic candidate.

b) more highly religious people supported the democratic candidate, while more nonreligious people supported the republican candidate.

c) more moderately religious people supported the republican candidate, while more nonreligious people supported the democratic candidate.

d) more moderately religious people supported the democratic candidate, while more nonreligious people supported the republican candidate.

answer: a.