The correct answer is a) caste.
In India, the division of kin groups in Jatis is not based on a specific principle, varying from ethnic origins to geographical occupation, exhibiting some variance. While the Jatis have not presented a fixed hierarchy, they present notions of a rank achieved over time considering lifestyle and social, political or economic status and considering the fact that the caste has a direct impact in these factors, we understand why it is the more relevant idea.
Answer: Only nineteen of seventy-five Roman emperors died of natural causes. Even for some of them, historians speculate they were actually assassinated. Some emperors died of old age, some of the diseases. Emperor Marcus Aurelius, Emperor Lucius Verus, and Emperor Claudius Gothicus died of the plague.
You can get through anything even with Giants on your back on over your shoulder