Answer:
Reductions in Child Mortality. ...
Vaccine-Preventable Diseases. ...
Access to Safe Water and Sanitation. ...
Malaria Prevention and Control. 
Explanation:
The average life expectancy of a child born in the U.S. in 1900 was 50 years. By 2010, this number had increased 60% to 80 years.1 Biomedical, epidemiological, and behavioral research combined with public policy played a major role in this gain. Below are major public health milestones of the last 100 years
 
        
             
        
        
        
Answer:B
Explanation:The cotton gin made it easier to clean cotton so more cotton less value.
 
        
             
        
        
        
Answer:
No one really knows the answer.
Explanation:
All the potential knowledge containing that century is lost in history.
May i please get a brainly lol 
 
        
             
        
        
        
Answer:
Irresistible Impulse.
Explanation:
As the term implies, an irresistible impulse is a defense by excuse (in this case by insanity) in which the defendand shouldn't be held responsible for their actions given that they could not control them.