17.According to Ferdinand Tönnies, a social organization based on in an impersonal and loosely tied community, in which individuals focus is on the pursuit of self-interest, is called A. Wissenschaft.B. mechanical solidarity.C. Gemeinschaft.D. Gesellschaft.18._____ is a type of social organization typically found in large cities. 19.Which is typical of a Gesellschaft type of social organization? 20.According to Emile Durkheim, homogeneous rural communities typically exhibit close social ties and limited individuality. This is characteristic of _____ solidarity.