Answer:
 Lysine is one of nine essential amino acids in humans required for growth and tissue repair, Lysine is supplied by many foods, especially red meats, fish, and dairy products. Lysine seems to be active against herpes simplex viruses and present in many forms of diet supplements.
Explanation:
 
        
             
        
        
        
Most reasonable answer is the swallowable camera one. mris and cat scans were invented in the 70s and the rest of the answers are around the 1800s or before.
        
                    
             
        
        
        
<span>The tracheae possibly have evolved directly from the book lungs</span>
        
                    
             
        
        
        
Answer: Sally
If Harry's negligent act injures Sally, and Susan, while attempting to come to Sally's aid breaks her arm in the process then, Harry is liable for the harm to Sally.
Explanation:
As a mathematical expression, we can say the action of Harry H, is directly proportional to the injury to Sally S; while the mistake of Susan N is directly proportional to injury to Sally S. 
So, if H = S and N = S, it is safe to say 
H = N = S. 
Thus, Harry negligence create room for Susan mistake, which eventually harmed Sally.