Answer:
Explanation:
Contagious diseases are spread by contact, while infectious diseases are spread by infectious agents. Something "contagious" is by default "infectious" because contact exposed you to the infectious agent, but something infectious isn't always contagious.
 
        
                    
             
        
        
        
Antibodies, a small amount of the germ
        
             
        
        
        
Pretty sure it's B. Conjugation because that is a form of sexual reproduction in the reproduction of prokaryotes.
        
                    
             
        
        
        
C. They are specialized tissues that form an organ system.  
hope it helps!