What is the major finding of Elinor Ostrom with regard to 'common property resources' (CPRs)? a. Neither the governments, nor markets but the communities are capable of managing the CPRs on a sustainable basis b. Neither the governments, nor communities but the markets are capable of managing the CPRs on a sustainable basis c. Neither the community, nor markets but the governments are capable of managing the CPRs on a sustainable basis d. Neither the government, nor markets and nor communities are capable of managing the CPRs on a sustainable basis