Answer:
The sentence that best shows that Ostrom caused a major shift in how economists approach a particular subject is:
'Until Ostram came along the idea of the "tragedy of the commons" was widely accepted by scholars.'
Step-by-step explanation:
And what did Ostram come along with? Her research shows that groups can work together for their common interests through the principle of collective property rights. This put the "tragedy of the commons" theory to shame. Affirmatively, she concluded that if individuals are given the opportunity, they can act in their common interests instead of in each individual's selfish interest.