Which sentence best shows that Ostrom caused a major shift in how economists approach a particular subject?

Answer:
Im not sure
Explanation:
But I think it is:
'She showed that people can develop their own systems without outside regulation'
Answer:
Until Ostrom Came along, the idea of the “tragedy of the commons” was widely accepted by scholars
Explanation:
The other answer given is wrong and this was my second choice that reflects a change/shift in how economists approach a particular subject.