'Demand Polity and 'Command Polity' are terms associated with ?

'Demand Polity and 'Command Polity' are terms associated with ?
 a)Rajni Kothari
 b)Helen I. Tinker
 c)Lloyd I Rudolph and Susanne H. Rudolph
 d)David Washbrook

Lloyd I Rudolph and Susanne H. Rudolph