![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
What is the conclusion of the research?
A.
What nature is worth and how to value nature.
B.
The brain did not respond to contingent valuation studies the way it did to all other known classes of economic behavior.
C.
striking similarity in the brain structures
D.
All of the answers above mentioned