'The tribal communities were originally separated from one another, subject to unequal pressure of the Hindu social and economic system.' According to sociological perspectives on Indian tribes, what did this situation give rise to?

Consider the following statements regarding the distinctive socio-cultural and political characteristics of Tribes in India: A. Tribal communities generally inhabit specific geographic topographies such as forests and hills, which serves to reinforce their social and cultural practices. B. Kinship and blood ties are the central pillars of social organization, providing the primary basis for group solidarity and social cohesion. C. Tribal societies are characterized by egalitarian values, featuring significantly fewer institutionalized inequalities when compared to caste-based systems. D. The political organization of tribes is structurally identical to mainstream administrative systems and excludes the role of traditional tribal chiefs. Choose the most appropriate answer from the options given below:

Which scheduled tribe of Central India was studied extensively by S. C. Dube for his landmark monograph 'The Kamar' (1951)?