The correct answer is option B.
Genre is a category of artistic composition as in literature or music, which share similarities in style, form or subject. It also refers to any type of communication form, such as written, oral, artistic or digital. As a consequence, email, poster and website belong in the genre classification.
 
        
                    
             
        
        
        
C. Cause: Ernie lends Alfonso his bike. Effect: Alfonso can go on his first date with Sandra.
        
                    
             
        
        
        
B. Noting which details provide essential support to an author’s main idea is an important study skill.
        
             
        
        
        
Anton Chekhov's naturalism
 Aristotle's tragedy
 Clifford Odet'sagit-prop
 Thornton Wilder's expressionism 
I put four hopefully this helps