The process is called Peer-Reviewing. In Peer-Reviewing, scientists/academic peers "peer review" the work of a scientist to check for accuracy or any false information that might reduce the legitimacy of their study or change "how realistic/real" their study is. 
p.s. This is also common sense because scientists make up an entire scientific community who base their scientific studies on consistency and accuracy. 
        
             
        
        
        
The public is upset with the farms’ unnatural farming practices.
        
                    
             
        
        
        
Answer:
B. Australia is isolated
Explanation:
They originated in South America and spread throughout the world, but due to competition on other continents, the other marsupials died out, while the ones on Australia lived.